A woman, accidentally caught in a dark deal, turns the tables on her captors and transforms into a merciless warrior evolved beyond human logic.

In Marseilles (France), skilled pizza delivery boy Daniel who drives a scooter finally has his dreams come true. He gets a taxi license. Caught by the police for a huge speed infraction, he will help Emilien, a loser inspector who can't drive, on the track of German bank robbers, so he doesn't lose his license and his dream job.

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.