A sadistic rapist is targeting teenage girls and terrorizing San Francisco. Patrol Officer Lauren Starkley finds herself and her daughter, Courtney, caught in the predator's cross-hairs. Lauren has uncanny skills for detection and routinely finds evidence the detectives missed. Sleep-deprived and stressed, she pursues the rapist during her off-duty hours. As she gets closer to unraveling the truth, the danger escalates, and the rapist closes in. Can Lauren stop him before Courtney becomes his next victim?