A seemingly ordinary breakup shatters Rosalie's world, revealing a dark, obsessive side to her ex-boyfriend, Christopher. When his rage escalates to violence, Rosalie finds herself thrust into a terrifying fight for survival, desperately trying to protect her little sister from a nightmare come true. Can she escape the clutches of a man who believes if he can't have her, no one can?

Helene Amsel, a prodigy psychiatrist, takes on the ultimate challenge: treating Nathan Parker, a notorious serial killer, in the world's most heavily guarded prison. Six psychiatrists have failed before her. As she's drawn into his twisted games, navigating a hostile bodyguard and an obsessive ex, Helene must confront her own sanity in a world where love and darkness intertwine. Will she unravel his mind, or will he consume hers?