Henry Hill (Ray Liotta) admits, "As far back as I can remember, I always wanted to be a gangster," referring to his idolizing the Lucchese crime family gangsters in his blue-collar, predominantly Italian-American neighborhood in East New York, Brooklyn in 1955. Wanting to be part of something significant, Henry quits school and goes to work for them. His Irish-American father, knowing the true nature of the Mafia, tries to stop Henry after learning of his truancy, but the gangsters threaten the local postal carrier with dire consequences should he deliver any more letters from the school to Henry's house. Henry is able to make a living for himself, and learns the two most important lessons in life: "Never rat on your friends, and always keep your mouth shut," the advice given to him after being acquitted of criminal charges early in his career.
Henry is taken under the wing of the local mob capo, Paul "Paulie" Cicero (Paul Sorvino) and his associates, Jimmy "The Gent" Conway (Robert De Niro), who loves hijacking trucks, and Tommy DeVito (Joe Pesci), an aggressive armed robber with a hair-trigger temper. In late 1967 they commit the Air France Robbery, marking Henry's debut into the big time. Enjoying the perks of their criminal life, they spend most of their nights at the Copacabana with countless women. Henry meets and later marries Karen (Lorraine Bracco), a Jewish girl from the Five Towns. Karen is initially troubled by Henry's criminal activities, but is soon seduced by his glamorous lifestyle. When a neighbor assaults her for refusing his advances, Henry pistol-whips him in front of her. She feels aroused by the act, especially when Henry gives her the gun and tells her to hide it. Wikipedia