The body of a young woman is found in the marshes of L.A.'s Ballona Creek. As with most murders Detectives John Testarossa and Alex Ortiz are asked to solve, this one makes no sense.When a second body is found, and then a third, the only thing the young victims have in common is that, as children, each went missing for four nightmarish days.And then they were released. Alive.As more dead women turn up, the detectives must navigate some of the city's darkest history while racing to save the next potential victim and get into the mind of a killer who keeps coming back for more.As the truth comes together, Testarossa collides with an evil like he has never known and risks losing all he holds dear in the process, including the one woman he can't seem to forget.