Seventeen years ago, three young women were murdered and their bodies dumped in the wasteland of the Los Angeles River. The serial killer was never found. Now, Lieutenant Alex Delillo is forced to re-open the case after the brother she never knew existed, a private investigator, is found murdered. As Alex gets closer to the truth behind her brother's murder, alarming flashbacks from her childhood start to plague her and she realises that the truth may lie closer to her life than she could have ever imagined.