When Tamara suddenly disappears, Officer Lucy Chen refuses to believe she simply ran away. As more clues begin to surface, Lucy and the LAPD uncover a chilling connection between Tamara's disappearance and a series of brutal unsolved murders. Guided by cryptic riddles, hidden coordinates, and a killer who always seems one step ahead, Lucy, Tim Bradford, Angela Lopez, Nyla Harper, John Nolan, and Celina Juarez race against time to save Tamara before she becomes the fourth victim. But as the investigation unfolds, one terrifying truth becomes clear... in this case, no one can be trusted.