Part-time model Valentine unexpectedly befriends a retired judge after she runs over his dog. At first, the grumpy man shows no concern about the dog, and Valentine decides to keep it. But the two form a bond when she returns to his house and catches him listening to his neighbors’ phone calls.
Following the death of her husband, Kate moves back home with her young child to live with her sister. As she begins to rebuild her life, she quickly realizes that the Doctor for whom she works is really a psychotic serial killer, his victims murdered with snake venom. As she begins to unfold his dark secrets, she finds she is in as much danger as his victims.
This French thriller begins with a flashback to a small village dance where a six-year-old girl is kidnapped and killed. Seventeen years later the murder remains unsolved. The girl's parents Caroline and Chris have gone on with separate lives Caroline remarried and had another daughter while Chris became an alcoholic. The two are thrown back together when each begin receiving strange messages that imply their daughter has returned from the dead for vengeance. They contact a police detective (the lover of Caroline's best friend) who finds the case intriguing and decides to reopen it. Unfortunately, as soon as he begins questioning the old suspects, people begin to die.
