Max, a ruthless fifty-year-old hitman, discovers that he has a problem: he now faints at the slightest drop of blood. His future in the profession being compromised, he will have to retrain... But not so easy when his only professional skill is to kill people... They get help from a couple of young neighbors, Karim and Stéphanie, who cannot imagine not for a moment who they are dealing with... Max becomes attached, in spite of himself, to the young couple, until his past catches up with him.