Léon: The Professional

Private investigator Matthew Scudder is hired by a drug kingpin to find out who kidnapped and murdered his wife.

A Chicago cop is caught in the middle of a gang war while his own comrades shun him because he wants to take an irresponsible cop down.

Thief Duke Anderson—just released from ten years in jail—takes up with his old girlfriend in her posh apartment block, and makes plans to rob the entire building. What he doesn't know is that his every move is being recorded on audio and video, although he is not the subject of any surveillance.

New York police detective John Shaft arrests Walter Wade Jr. for a racially motivated slaying. But the only eyewitness disappears, and Wade jumps bail for Switzerland. Two years later Wade returns to face trial, confident his money and influence will get him acquitted -- especially since he's paid a drug kingpin to kill the witness.