Rebecca must play a double game after the police discover Laetitia's body; though Collange's alibi no longer holds up, Rebecca learns he's been released, and now it's Lucille who is in danger.
After a five-year hiatus, Rebecca is back on the job pursuing an elusive serial killer, all while grappling with disturbing blackouts and the breakup instigated by her husband.
Rebecca identifies Laetitia Baumann's murderer and to prove his guilt, conducts a covert operation that backfires; a final hypnotherapy session reveals the terrifying origin of Rebecca's blackouts.