Forensic psychiatrist Dr. Madison Taylor (Merrin Dungey), who works in the New York City prison system evaluating inmates for parole, is a witness to her husband Jeremy (Anthony DeSando) being assaulted by Francis Tate (Devon Graye) during a home invasion. In the struggle, Francis knocks Madison unconscious. When she wakes in the hospital, Detective Thompson (Thomas Q. Jones) reveals to her that her husband was murdered. Though Madison identifies Francis in a police lineup, she later testifies during his trial that he was not the killer.In the aftermath of the trial, Madison is unable to sleep and begins to photograph strangers, places herself in increasingly dangerous situations, and ultimately starts to stalk Francis. After Jeremy's death, Madison's relationship with Jeremy's sister, Cynthia (Jennifer Gelfer), and her husband James (Brit Whittle) becomes strained. Madison attempts to understand the thrill that so many of the inmates that she had worked with felt with hunting their victims, and contemplates whether this was a buried aspect of her own personality. She continues working with incarcerated felons, including Eddie (Scotty Tovar), who was convicted of killing his father. Madison's self-destructive behavior leads her to meet Francis for coffee. Their encounter develops into a violent, sexual relationship as she tries to understand who Francis is and why he murdered her husband. She learns from Francis that he had broken into her apartment because he is a voyeur and that he did not intend to kill her husband. (thanks to Wikipedia)