Brooks is a young English soldier in the trenches during World War I. After being hit by an artillery shell, he suffers a concussion and wakes up in a temporary English hospital, where he is treated by Dr. Haven. As Brooks recovers, he gets to know Dr. Haven, and the two men frequently discuss how the world will likely never go back to the way it was before the war. Brooks also struggles with PTSD, fits of rage, and persistent blackouts, but he decides not to tell Dr. Haven about these episodes. One day, he finds himself in the nearby village, without any memory of how he got there. He enters a pub, where the young barmaid, Nancy, flirts with him. Later, at Dr. Haven's cottage, Brooks expresses his irritation with the way modern-day girls behave, and he longs for the societal norms of the Victorian era, which was before his time. Brooks frequently visits Dr. Haven and presses him for stories about his life during the Victorian years. Dr. Haven is initially reluctant to remember the past, but he eventually tells Brooks about his days working as a doctor in London's East End, and he shows Brooks a picture of his wife, Emma, who died in childbirth. Brooks is particularly drawn to the photo, and he imagines Emma as the perfect Victorian woman. One night, on his way home from Dr. Haven's cottage, Brooks witnesses a young couple leaving the woods. Three days later, he learns that the young woman was brutally murdered later that night and that the police want to question the hospital patients. Dr. Haven tells Brooks that he knows about his blackouts, and he asks him if he remembers that night. Brooks assures him that he didn't have any blackouts that day. Over the next few days, Brooks begins to doubt his own memory. He worries that he might have been responsible for the girl's death after all, and he becomes paranoid. All of a sudden, he finds himself walking through the village with Nancy at night, unable to remember how he got there. He walks her home, where Nancy kisses him. As soon as she enters her house, Brooks flees to Dr. Haven's cottage, intent on coming clean about the blackouts and episodes of rage, out of fear that he could hurt someone else. When he arrives, the cottage is empty, but Brooks sees the photo of Emma in a milk crate under Dr. Haven's bed. Brooks goes to take a closer look, where he finds a number of articles detailing a spate of bloody murders in London in the 1880s. Realizing that Dr. Haven is a serial killer, Brooks runs back to Nancy's house, where he sees Dr. Haven leading her at knifepoint towards the river. Brooks charges at Dr. Haven, managing to avoid the knife and save Nancy. After Dr. Haven runs away, Brooks realizes that Dr. Haven had planned on taking advantage of his blackouts and pinning the murders on him. Brooks and Nancy realize that Dr. Haven has set his own house on fire. Brooks arrives in time to see Dr. Haven standing inside the house as it burns around him.