Ray (Chiwetel Ejiofor) is an excellent FBI agent. His partners Jesse (Julia Roberts) and prosecutor Claire (Nicole Kidman) are his friends. The three of them form an indestructible iron triangle, punishing evil and invincible. However, one day, Jesse's daughter was brutally murdered. The death of her daughter brought Jesse a huge mental trauma, and the three gradually parted ways. In a blink of an eye, thirteen years have passed. The sensational murder case of that year has gradually been sealed, but the harm it has brought to people has not decreased at all, and the murderer is still at large. By chance, Ray found some new clues, which made him start to re-investigate the case of the year. What Ray didn't know at this time was that he was about to open a Pandora's box that hid a terrible secret.