A tight-knit team of rising investigators, along with their supervisor, is suddenly torn apart when they discover that one of their own teenage daughters has been brutally murdered.

The tragic tale of an all-American girl who was transformed into a cold-blooded killer in the summer of 1969.

2002: Ray Kasten (Chiwetel Ejiofor) and Jess Cooper (Julia Roberts) are two investigations in a private police unit led by the DA. When they receive an anonymous tip about a girl raped and killed, they rush to the scene. Ray realizes it is Jess' daughter and the team falls apart due to the grief. In 2015, Ray comes back to LA, and says that after 13 years, he has found a lead and convinces the DA to reopen the case. They find clues and leads unknown to them, and secrets from the past come to light as they start discovering the real, chilling truth. Meanwhile, Jess, unsatisfied with the law, decides to take matters into her own hands and track down the killer, no matter what lengths she has to go to.