When Detective Molly Daul works two homicides back to back, she realizes she's dealing with a sexual predator who targets trusting young women. Arrested before he can kill again in Seattle, his chilling confession remains with Molly to this day.

After Kate Johnson is murdered in her dormitory room, detectives ask why this innocent young woman was targeted; detectives collect 400 DNA samples, establish a secret task force and track down Johnson's killer to get their chilling answer.