Donnie Brasco plot
"Based on a true story."
Based on a true story, the film follows FBI agent Joe Pistone infiltrating the New York mafia. Under the name Donnie Brasco, he makes several friends, and he soon manages to work his way up into Sonny Black's mafia family. However, the undercover work is slowly becoming too much for Pistone. His marriage is on the rocks, and the mafia thinks a mole is present.