Beneath Summary By Chapter | Ariel Sullivan
Introduction To “Beneath” (Chapter‑by‑Chapter Summary)
Sullivan crafts a claustrophobic, tense narrative that alternates between gritty tactical action and raw emotional wounds.
As Sasha is integrated into Unit Seven—a close‑knit “family” still grieving their previous medic—she must confront not only the lethal traps of the irradiated surface but also the corruption festering within Haven’s leadership.
What begins as a mission to find a hidden supply cache becomes a fight for the soul of their dying world, forcing Sasha to choose between her hard‑won solitude and the people who might finally make her believe in hope again.
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Book Structure Overview
| Feature | Details |
|---|---|
| Total Chapters | 37 Chapters |
| Intro Section | Journal Entry (Day 100) |
| Epilogue | Yes |
| Narrative Style | Linear with flashbacks |
| Setting | Underground bunker (Haven) & surface wasteland |
Beneath Summary Chapter by Chapter
⚠️ Spoiler Warning: This section contains detailed, chapter-by-chapter plot summaries.
Chapter 1: The Attack
Sasha Cadell hunkers in the tunnels of Haven as a nuclear storm rages on the surface. Rations are dwindling, and society is strictly divided into five color‑coded sectors. She recalls her life before the war, which began when she was fifteen years old.
Walking to her quarters, she is cornered and harassed by three men from Sanitation. Using her father’s training, she defends herself with a knife and a pistol, stabbing one man in the leg and threatening the others until they flee.
Commander Tristian Hayes finds her at the scene and escorts her back. He urges her to join the Force as a medic, but she refuses. Sasha reflects on her hatred for humans and the monotony of her current life, then disappears into the bustle of Expansion.
Key Moment: Sasha successfully fights off three attackers using lethal precision, demonstrating her combat readiness.
Chapter 2: Ghosts of the Ward
Sasha lives in a crowded sleeping porch and uses a communal shower. She remembers meeting Tristian three years prior when he was brought to the Ward with a severe illness; while other doctors gave up, she stayed by his side until he recovered, earning the nickname “Death’s Angel.”
She recalls lying on health forms to protect soldiers’ scores, an abuse of the system she used for Tristian and Levi. Tristian once offered her a secret room for medical treatment to bypass health score penalties.
Her relationship with Unit Seven fractured six months ago when a member named Lily died under her care. Unable to sleep, she visits a man named Jaxon for a purely physical distraction, leaving his room feeling unfulfilled and wandering the tunnels alone.
Key Moment: Sasha reflects on the trauma of Lily’s death, which caused her to leave the Ward for Expansion.
Chapter 3: The Draft
Ingrid, a member of Unit Seven, wakes Sasha with a knife drawn and demands she come to Command. She is escorted to the Gym, the massive training ground for the Force. Commander Lyssa Burdon informs her that her time in Expansion is over.
Tristian has requested a medic, and Sasha’s high health score and medical history make her the only candidate. Burdon tests Sasha’s skills on the shooting range in front of a crowd. Sasha initially tries to miss to avoid the draft but changes her mind when a soldier insults her.
She shoots a perfect magazine with lethal accuracy. Burdon officially transfers her to Unit Seven under Tristian’s command.
Key Moment: Sasha’s perfect shooting performance leaves the commanders and soldiers in awe.
Chapter 4: Unit Seven
Sasha returns to Unit Seven’s living quarters, feeling trapped by her own name. The unit files in: Levi, Patrick, Isla, Rumi, Ingrid, Damien, and Tristian. Ingrid refuses to accept Sasha as a replacement for Lily, mocking Sasha’s sexual history.
Tristian intervenes, asserting that Sasha is now one of them. After the unit leaves, he and Sasha have a fierce argument where she accuses him of trying to “save” her against her will. He admits he stands by his decision because she is medically competent and needed for Haven’s future, then hands her a new dark blue identification band.
Sasha flees the quarters, feeling she no longer recognizes herself.
Key Moment: Tristian asserts his authority as Unit Commander, forcing Sasha to accept her new role.
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Chapter 5: The Obstacle Course
Rumi wakes Sasha for her first day in the Force and provides a new, well‑fitting uniform. Sasha begins mat training but refuses to try, allowing herself to be pinned repeatedly. Tristian warns her that Lyssa Burdon has ordered the entire Force to “make the Angel fall.”
Sasha is introduced to the obstacle course, a “death trap” of ropes and walls. She fails to climb the rope at the end, falling to the mat over and over as the unit watches.
Key Moment: Burdon publicly orders the Force to break Sasha, placing a target on her back.
Chapter 6: The Mess Hall
Sasha eats in the Force mess hall, noticing the luxury of meat and better rations compared to other sectors. She shocks the table by being brutally honest about her sexual experiences in different sectors, making Tristian tense.
She follows Jaxon into the locker room to end their relationship. He mocks her new role, but she insults his performance in bed in front of an audience. Rumi follows Sasha and warns her that the unit is her family and they will not let her ruin anything.
Key Moment: Sasha publicly humiliates Jaxon in the locker room, ending their relationship.
Chapter 7: The House
Tristian gives Sasha a Force‑issued pistol for a range warm‑up. She shoots with perfect, rapid accuracy, shocking the unit. Tristian orders the unit to perform “The House,” a tactical close‑quarters exercise usually reserved for new cadets during the “Auction.”
Sasha receives a locker full of high‑quality gear that fits her perfectly. Levi helps her with her plated gear when she struggles with the straps. Rumi tells Sasha that Command got rid of medics because they don’t care about soldiers living.
Key Moment: Sasha reveals her sniper‑level shooting skills, which she learned from her Special Forces father.
Chapter 8: The House (continued)
Unit Seven enters The House for a hostage extraction simulation. Sasha is suffocated by the heavy gear and the silence. Seeing a hologram of a young boy triggers her PTSD about her brother Eli’s death; she freezes completely as the simulated hostage‑taker kills the boy.
Tristian aborts the mission. Sasha flees to the bathroom and vomits violently. Rumi quietly helps her out of her gear and provides a shower. Later, Tristian confronts her in the tunnel, accusing her of using Jaxon as a “buffer” to avoid her trauma.
Key Moment: Sasha’s traumatic flashback in The House causes the unit to fail the mission.
Chapter 9: Two Weeks
Two weeks pass with Unit Seven members taking turns on “watch” to protect Sasha from Burdon’s bounty. Damien gives Sasha a history of the seventeen units and their roles. Sasha notes Damien’s ankle pain and remembers Lily’s warnings about each unit member.
Sasha finds Tristian in The House entryway, and they review her tactical errors on a tablet. He coaches her on footwork and weapon placement, getting physically close. Their intimate moment is interrupted by “birds”—commanders watching from the observation deck.
Sasha tells Tristian she is a liability and walks away.
Key Moment: Tristian and Sasha share an intimate, tense moment during tactical training.
Chapter 10: The Attack on Sasha
Sasha is ordered to spar with other cadets. A large man named Murray attacks her, trying to break her nose to earn a promotion from Burdon. Sasha enters a “beast” state of calm and holds Murray at knife point while aiming a pistol at his eyes.
Unit Seven arrives to find her victorious. Kaleo, Unit Five’s commander, mocks Sasha and takes her to Burdon’s office. Burdon attempts to break her by revealing she knows about Sasha’s brother and shows her the “death roll” of patients Sasha signed off on. Tristian bursts in, cites Force bylaws, and successfully retrieves Sasha’s weapons.
Key Moment: Tristian stands up to Burdon in her office, reclaiming Sasha’s weapons and his unit’s dignity.
Chapter 11: The Rope
Unit Seven debates who should be Sasha’s partner for their upcoming mission. Levi volunteers and pushes her until she successfully uses jiujitsu to make him tap. He challenges Sasha to climb the rope to prove she won’t give up in the Abyss.
Sasha climbs to the stone ceiling, symbolizing her renewed commitment. Later, she finds Tristian nearly naked on the couch and admits she isn’t looking for a distraction anymore.
Key Moment: Sasha successfully climbs the rope to the stone ceiling, proving her commitment.
Chapter 12: The Mission Reveal
Tristian announces a unit meeting in the Exploratory Room. They see a 3D hologram of the dead, gray world above. Tristian drops a bombshell: Haven was provisioned for ten years, but due to overpopulation and wasted supplies, they have less than a year left.
He warns that if they don’t find a hidden supply cache, humanity will go extinct.
Key Moment: Tristian reveals that Haven is “almost out of time” and everyone will die within a year without the mission’s success.
Chapter 13: Mission Hope
Tristian explains that the supply creators left “booby traps” to protect the cache. Unit Seven will venture into the “Abyss,” an unmapped area where radiation levels are reportedly dropping. He gives everyone twenty‑four hours off before departure.
He returns Sasha’s father’s military knife, which Dr. Kumar retrieved from the attacker’s leg. Tristian tells Sasha her help has never been “nothing.”
Key Moment: Sasha receives her father’s military knife back, reconnecting her to her roots.
Chapter 14: Departure
Sasha spends two days memorizing the unit’s blood types and preparing the medical bag. She donates her own blood to the reserve. On the morning of the mission, the unit eats a massive breakfast in silence. They gather in the detoxification room at the guard shack.
The steel doors to Haven close, locking Unit Seven in the holding box as they prepare to exit.
Key Moment: Sasha donates her own blood to the medical bag to ensure the unit has a reserve.
Chapter 15: The Surface
The exterior doors grind open to reveal a world of blinding light. The unit steps onto the desolate, gray surface for the first time in the narrative. Tristian leads with the oath: “As long as there’s life, we defend it with our own.”
Sasha is overwhelmed by the vastness; she confesses that for her, the world died when her family did. They pass dented steel doors that serve as tombstones for those who didn’t make it inside Haven.
Key Moment: The unit steps onto the desolate, gray surface of the earth for the first time in the narrative.
Chapter 16: Outpost One
Unit Seven encounters Unit Twelve and their commander, Henderson, on the surface. Henderson warns that Kaleo’s unit left Outpost Two a mess. To pass the time, the unit plays a “question game” where everyone must answer honestly or take night watch.
They stop to eat nutrient paste and discuss the “burns” of bodies from the early post‑war years. They reach Outpost One, a shipping‑container‑sized room buried underground.
Key Moment: The unit encounters Henderson, who hints at a larger conflict with Kaleo and Burdon.
Chapter 17: Outpost Three
The “regrets” question leads to a restless night of nightmares. The next day, the unit treks toward Outpost Three, noticing that Unit Five is missing from the navigation. Outpost Three is bare and recently built, with no kitchen or bathroom.
They discover Kaleo stole some of their blankets—a clear hostile message. Tristian orders Damien not to engage in a fight with Kaleo.
Key Moment: The unit realizes Unit Five has disappeared from the map, signaling a potential betrayal.
Chapter 18: The Trap
Sasha wakes up curled around Tristian. She overhears Levi and Tristian discussing ditching the radiation suits to move faster. The unit agrees to leave the suits at the outpost.
Sasha and Levi search the eastern section and encounter an explosive trap marked with an “X.” Levi throws a rock to test it, and Sasha shields him from the blast.
Key Moment: Sasha instinctively shields Levi from a trap explosion, solidifying their partnership.
Chapter 19: Levi’s Injury
Sasha has a flashback to her father explaining that flowers die above ground but remain strong beneath. Ingrid radios that Tristian went below into a tunnel and has stopped responding. Sasha and Levi sprint toward their location.
A trap of giant metal stakes impales the ground. Levi is gravely injured with a mangled shoulder. Sasha performs an infield blood transfusion from her own arm and drags him miles back toward Outpost Three.
Key Moment: Sasha performs a life‑saving blood transfusion from her own arm into Levi’s in the field.
Chapter 20: Retreat
The rest of Unit Seven arrives and finds Sasha covered in Levi’s blood. She directs them to donate blood for Levi. Tristian helps reset Levi’s dislocated shoulder.
The unit suits up and jogs back to Haven, dragging Levi on a tarp. Upon entering, Sasha conveys Levi’s status to Dr. Kumar. Tristian pulls her aside and thanks her for saving his best friend.
Key Moment: The entire unit operates as a “walking blood bank” to keep Levi alive during the retreat.
Chapter 21: Jaxon Joins
At Formation, Burdon announces that Levi is being replaced because he won’t be cleared in time for the next mission. She introduces Jaxon Taylor as the new member of Unit Seven—a move intended to humiliate and spy on Tristian.
Jaxon gloats to Sasha, asking if she missed her former partner.
Key Moment: Burdon forcibly assigns Jaxon to Unit Seven, a move intended to humiliate and spy on Tristian.
Chapter 22: The Swap
Sasha visits the Ward and discovers Burdon has ordered that Levi not be released until his stitches are removed, effectively tanking his health score. To save him, Sasha swaps her perfect health chart with Levi’s mangled one and exchanges their identification bands while he sleeps.
Dr. Kumar reveals he knew she had been lying on forms for years. Levi encourages Sasha to “burn it all down and rise from the ashes.” Rumi asks Sasha to find records of three Expansion members she suspects faked their deaths.
Key Moment: Sasha illegally swaps her ID band and health score with Levi to ensure he stays in the Force.
Chapter 23: Rumi’s Request
Sasha wakes in the Ward with Rumi, who brings coffee. Rumi reveals the meteorology observatory is being tampered with to control when units go above; she suspects people are faking their deaths.
Sasha returns to the living quarters and finds Tristian and Jaxon facing off on the mats. Jaxon taunts Tristian about his sexual history with Sasha. Tristian nearly snaps Jaxon’s arm and warns him never to speak of Sasha again.
Damien collapses, clutching his left ankle in severe pain.
Key Moment: Tristian brutally defeats Jaxon in a spar, threatening his life for insulting Sasha.
Chapter 24: Damien’s Secret
Sasha and Isla carry Damien back to their quarters. Damien confesses that his cousins abandoned him in a barn after equipment fell on his leg during their trek to Haven; he fixed it himself with wooden boards and a belt.
She visits the Ward for pain medication and searches the archives for Rumi’s list. She encounters Owen, who reveals that ninety‑seven people in Haven are sick with a new illness that started in the Kitchens. Sasha finds a note in her bag that warns: “Let the dead rest, Death’s Angel.”
Key Moment: Damien reveals his trauma of being left for dead by his own family because of his injury.
Chapter 25: Ingrid’s Plea
Tristian holds a unit meeting; Sasha declares Damien cannot go on the next mission. Tristian decides to keep the unit’s fractures secret, meaning they will go above under‑strength.
Sasha discovers that Ingrid’s sister, Bretta, is secretly ill in the “closet.” Ingrid breaks down, admitting she only blamed Sasha for Lily’s death because she was scared. Sasha agrees to treat Bretta in secret using the Force’s med bag supplies.
Key Moment: Ingrid breaks down and begs Sasha for help, ending their long‑standing feud.
Chapter 26: Lockdown
Patrick tells Sasha that the exits to Haven have been sealed. Sasha reflects on her sister Lara’s death from radiation illness. She continues to treat Bretta and a little girl from the Kitchens.
She finds another warning note from Kumar telling her to “find the snake.” Haven is placed under a mandatory curfew and sector travel is banned as the illness triggers mass panic.
Key Moment: Haven enters a full lockdown as the illness triggers mass panic and violence.
Chapter 27: The Bathroom
Sasha finds Tristian alone and finally admits she wants him. They share a frantic, desperate kiss, and he carries her to the bathroom for a highly charged sexual encounter.
Patrick knocks on the door looking for Tristian while they are together, but they remain hidden. After Sasha climaxes, Tristian leaves the room without a word, leaving her feeling confused and abandoned.
Key Moment: Tristian and Sasha’s relationship turns physical in a moment of intense mutual need.
Chapter 28: Kaleo’s Warning
Sasha visits Tristian in the commanders’ locker room to deliver paperwork. He admits he left because she said she only wanted a “distraction.” Tristian declares he wants “all of her.”
Kaleo interrupts them and reveals that he and Burdon used to be in the same unit with Tristian. He hints that Tristian is only using Sasha as a “revenge game” against Burdon. Tristian admits he and Burdon were once together; she staged the coup after he refused to become Force Commander.
Key Moment: Kaleo interrupts Tristian and Sasha, exposing their past relationship with Burdon.
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Chapter 29: The Angels
Levi tells Sasha the full story of Unit Thirteen, the “Angels.” He explains that Kaleo betrayed them during a mission four years ago, leading to Tristian being stabbed in the back. Burdon used the chaos to claim the Force Commander position.
Sasha visits Tristian in his room. They spend the night together, sharing a more intimate emotional connection. Tristian admits he has loved her since she asked him to stay in the Ward.
Key Moment: Levi reveals the depth of Tristian’s trauma and his self‑blame for Haven’s current state.
Chapter 30: The Truth
Tristian and Sasha wake up together and share their family histories. They discuss that Command is lying about the weather reports—it is clear above. Tristian plans to get the unit above regardless of Burdon’s orders.
As Sasha leaves, Kaleo corners her again, warning that Burdon will exploit her as Tristian’s weakness.
Key Moment: Sasha and Tristian exchange their deepest traumas and confirm the weather reports are fraudulent.
Chapter 31: Kumar’s Gift
The illness worsens, and Sasha works double shifts. Dr. Kumar is dying of the illness. She visits him in his dark office, and he tells her that he promised her sister Lara he would watch over her. He warns Sasha not to trust Dr. Uri.
Kumar gives her a small rectangular computer chip, which he calls a “key.” He tells her a “bird” brought it for her to “keep hope alive.” Sasha sits with him until he passes away.
Key Moment: Dr. Hari Kumar passes away, leaving Sasha with a mysterious key to the supplies.
Chapter 32: Mutiny
Sasha runs to the supply closet and finds Wilma Abbott waiting with her gear. Wilma tells her the mutiny is starting. Sasha sprints to the detox room, where the unit is waiting in full gear.
Burdon and Kaleo arrive as the doors are closing. Tristian confronts Burdon through the gap, telling her he is taking the Force. The unit escapes onto the gray earth once more.
Key Moment: Unit Seven successfully executes a mutiny and escapes Haven into the Abyss.
Chapter 33: The Cache Entrance
The unit runs all night to reach Outpost Three. Tristian reveals that the mutiny was planned with Rumi and Levi to save Haven. Rumi admits she punctured the oxygen tanks in Haven to delay Burdon’s pursuit.
The next morning, they head to the supply cache entrance Tristian found. Half the unit stays above to guard. Sasha, Tristian, Isla, and Ingrid drop into the underground tunnel system.
Key Moment: Tristian admits he planned the mutiny to find the supplies before Burdon could use them as leverage.
Chapter 34: The Cache
Sasha uses the key chip Kumar gave her to open a hidden door. They discover a massive room filled with boxes of food, medical gear, art, and jewels. The unit reunites and celebrates their victory.
Sasha finds a room with three rows of pods labeled “TABITHA.” She touches her chip to a pod, and it activates. She sees a human woman with gray eyes inside the pod. Suddenly, a gunshot echoes through the facility.
Key Moment: Unit Seven discovers the massive supply cache, securing a future for Haven.
Chapter 35: Rumi’s Betrayal
Sasha runs back to find her unit held at gunpoint by Kaleo and his team. Rumi shocks everyone by running to Kaleo’s side and shielding him. She admits she has been Kaleo’s partner for two years and was spying on the unit for him.
Kaleo explains he was never a traitor; he stayed with Burdon to gather intel. He claims Kumar was in on the plan to plant the key for Sasha.
The unit is fractured but agrees to work together to get supplies back to Haven. Sasha returns to the pod room, but the woman she saw is gone.
Key Moment: Rumi is revealed as a long‑term spy and Kaleo’s lover.
Chapter 36: Return
The unit loads supplies onto a tarp and treks back toward Haven in silence. They use a secret entrance found by the “Moles”—Expansion members digging tunnels. They wait for the shift change to enter Haven unseen.
Tristian confesses his love for Sasha. As they approach the kitchen command center, Kaleo suddenly attacks Sasha to make it look like a real capture. Burdon appears with her pistol drawn, having been alerted by a spy.
Key Moment: Kaleo stages a violent capture of Sasha and Tristian to protect his cover with Burdon.
Chapter 37: Burdon’s Victory
Burdon reveals she found the records Sasha tampered with. Sasha’s new health score disqualified her from every sector except Sanitation or Expansion. Tristian offers Burdon “whatever you want” to save Sasha and the unit.
Burdon forces Tristian to become her second‑in‑command. Unit Seven is stripped of its exploratory status and relegated to guard shack duty. Sasha is expelled from the Force and sent back to Expansion. Sasha realizes that Henderson was the “snake” (spy) within their unit.
Key Moment: Burdon wins by forcing Tristian into her service and expelling Sasha from his life.
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