Five

At a suburban London train station, a narrator announces that someone will die this morning when the 7:06 train to London Victoria arrives. On the platform at 7:01, six-year-old Gideon breaks free from his mother, Emma, and runs toward the tracks. He loses his footing and begins to fall. Emma runs after him but hesitates, entertaining the intrusive thought that it would be easier if she lost him. The narrator warns that her subsequent thoughts are more troubling: She imagines people calling it an accident, and her reach slows. A businessman named Liam shouts and grabs Emma's elbow, pulling Gideon back. Their exchange is tense and familiar; Liam tells her to forget about "yesterday," and Emma mentions she is "working on" his brother.

Mrs. Worth, 77, stands smoking at the far end of the platform. She is heading to her daughter-in-law's funeral in London, where she will see her grandsons for the first time in five years. When Emma's phone flies onto the tracks during a struggle with Gideon, the shock triggers a cardiac event and Mrs. Worth collapses. Sonny, a 27-year-old with heterochromia (one brown eye, one green), kneels to help. Beneath his charismatic exterior, Sonny carries £32,000 in debt from an online gambling addiction and came to the station intending to jump in front of the train. Emma leaps onto the tracks to retrieve her phone; Liam follows and they struggle over it. Other witnesses include Bad Back, To Do List, and Medical Student, a young man from eastern Africa whose training was interrupted by war. Gideon leaps onto Liam's back, bites his neck, and forces him to drop the phone. One station away, the train departs.

Emma's backstory reveals a ruthless career in finance, where she blackmailed harassing colleagues out of their jobs. When her sister Anne confided about fertility struggles, Emma proposed an arrangement to Liam, her boss at D-Tech, the assistive technology company he co-founded with his twin brother Danny: sex, pregnancy, no parental obligations. Gideon's birth was premature and nearly fatal. His behavioral problems emerged early: head-banging, absence of empathy, violence toward caretakers. By six, he stabs Emma with a stiletto heel and rigs cupboards to strike her. Every caretaker quit, forcing Emma to leave her job. She copes by planning birthday parties for two. Liam arrives at Emma's house for a forgotten meeting and discovers her desperate situation: bare walls, a bloody cushion, and bruises from Gideon's violence.

On the platform at 7:03, the train is delayed. To Do List triggers the fire alarm in a panic, sending Medical Student into a wartime flashback. As Liam climbs from the tracks, his keys fall; he lowers himself to retrieve them, strikes his head on the platform lip, and collapses unconscious in the crawl space beneath the platform. No one notices.

Mrs. Worth's backstory traces a traumatic childhood. Her father, Gerald, a former surgeon who returned from World War II with severe trauma, taught 10-year-old Matilda (Mrs. Worth's given name) to dissect dead animals, sharing his lost calling in the only way he could. His behavior escalated into killing neighborhood pets, and Matilda left home as a teenager. She built a pioneering career in forensic pathology, raising her son Nicholas alone with dedication but emotional distance. Nicholas married Livvie, a young woman Mrs. Worth struggled to accept. After a babysitting incident that ended with an injured grandson and Mrs. Worth running over the family's French bulldog, the relationship collapsed. Mrs. Worth severed contact, telling Nicholas she was "better with the dead." Five years later, Livvie died of a rapid illness. Nicholas sent funeral details, and Mrs. Worth headed to the station.

Sonny's backstory follows a life shaped by attention-deficit/hyperactivity disorder (ADHD), loss, and addiction. His Scottish father, Graham, was killed cycling to work. His Colombian-Jamaican mother, Luna, raised Sonny alone, championing his intelligence against dismissive teachers. When Luna was diagnosed with terminal cancer, Sonny stopped attending university, stopped taking his ADHD medication, and discovered online gambling, whose dopamine hit provided the stillness his brain craved. Luna confronted him, calling addiction an illness, and devised a plan: His inheritance would be held in a trust with conditions. After Luna's death, Sonny followed the plan for three years and fell in love with Valentina, who was also recovering from a gambling addiction. A relapse destroyed everything; he burned through £32,000 in 27 days, and Valentina left. He walked to the station to die, but Mrs. Worth's collapse at his feet stopped him.

At 7:05, Bad Back spots Liam unconscious on the tracks. Sonny jumps down and runs toward him, seeing the train's headlights in the distance. He and Medical Student lift Liam to the platform. Mrs. Worth tells Emma that "the tall one wants to die," recognizing death in Sonny's eyes, and commands her to help.

Liam's backstory reveals his bond with his twin, Danny. Born in 1970, Danny's heartbeat was missed under Liam's during delivery. Cerebral palsy left Danny with limited mobility and slow speech, but extraordinary intelligence. Their mother, Doreen, raised them alone after their father abandoned the family. Danny's brilliance and Liam's charisma built D-Tech into the UK's largest assistive technology firm. Danny fell in love with Brendon, his physiotherapist. Suspicious of large bank transfers to Brendon's account, Liam attacked Brendon at their wedding. Danny used Emma to force Liam out of the company, threatening to publicize the attack as a homophobic assault. Emma participated because Danny could report her to social services over Gideon. Danny told Liam he did not need him. Liam then confronted Emma, demanding she persuade Danny to invest with him.

At 7:08, the five characters converge at the platform edge. Liam stands concussed, his back to the oncoming train, confusing Gideon for Danny. Emma grabs both their hands; for one second they resemble a family. Gideon kicks Emma until she releases him. Medical Student jumps onto the tracks to save Sonny. In the final seconds, Liam pushes Gideon to safety, believing he is saving Danny, and loses his balance, falling in front of the train. Emma's scream of "Gideon!" is the last word before impact.

The final chapter flashes forward approximately 10 years. Gideon, now 15, has been released from a youth facility after burning down the farmhouse of Anne and her husband, Ollie, while the family slept. He tells Emma he does not feel things and does not want to be bad, but only to avoid returning to prison. Mrs. Worth survived and reconciled with Nicholas and her grandsons, answering their questions about death with honesty and tenderness. Medical Student gave police a deliberately incomplete statement, knowing further involvement could jeopardize his immigration status. Sonny, hospitalized after Medical Student pulled him to safety, eventually heard Luna's voice telling him to begin again. He rebuilt his life and had a son with Valentina.

Liam is confirmed as the person who died. Danny made the investment Liam had championed and gave Emma her old job, enabling her to send Gideon to therapeutic school. Five years later, the investment was exposed as a global fraud; Danny lost almost everything, and Gideon was pulled from school and began setting fires. When Gideon was 22 and paroled, he found his way to an elderly Danny and told him he was Liam's last word. Danny smiled. Something lost was regained.

The novel closes with passengers arriving at London Victoria at 12:30. On the empty platform, a newspaper page lifts in an air current. Another train is on its way.