When a 28-year-old woman who was interned against her will in a psychiatric hospital is murdered the night she was scheduled to leave, young and brilliant police inspector Angela is put in charge of the investigation.
Angèle's mother convinces Bastien that her daughter is losing her mind and should be sectioned. But Angèle manages to escape. Certain that she knows the murderer, she persuades Favard to restart the searches. In the clinic's vegetable garden, they find what they'd been looking for from the start: Ana's heart.
