Ex-con attempting to go straight runs across serious problems. His girlfriend gets arrested for dealing crack to an undercover police officer. In a desperate attempt to get the charges dropped against his woman, he strikes a deal with a weapons cop to turn in local gun dealers. However, the D.A. is not satisfied with the results, resulting in some serious game playing and double crossing.

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.