Max wakes up one morning and discovers that his wife Hélène has left him in his sleep, without a word, taking their two children with her. He doesn't understand. The nights drag on, his demons get involved, he chooses to face them and to anchor himself in reality. He probes his feelings, revisits from top to bottom the artifice of his life. Max ends up rediscovering his love for Hélène and decides to win her back. But isn't it already too late?

Léon, the top hit man in New York, has earned a rep as an effective "cleaner". But when his next-door neighbors are wiped out by a loose-cannon DEA agent, he becomes the unwilling custodian of 12-year-old Mathilda. Before long, Mathilda's thoughts turn to revenge, and she considers following in Léon's footsteps.