Jerry Mulligan (Gene Kelly) is an American ex-GI who stays in post-war Paris to become a painter, and falls for the gamine charms of Lise Bouvier (Leslie Caron). However, his paintings come to the attention of Milo Roberts, a rich American heiress, who is interested in more than just art.
Dockworker Terry Malloy (Marlon Brando) had been an up-and-coming boxer until powerful local mob boss Johnny Friendly (Lee J. Cobb) persuaded him to throw a fight. When a longshoreman is murdered before he can testify about Friendly's control of the Hoboken waterfront, Terry teams up with the dead man's sister Edie (Eva Marie Saint) and the streetwise priest Father Barry (Karl Malden) to testify himself, against the advice of Friendly's lawyer, Terry's older brother Charley (Rod Steiger).
An aging silent film queen refuses to accept that her stardom has ended. She hires a young screenwriter to help set up her movie comeback. The screenwriter believes he can manipulate her, but he soon finds out he is wrong. The screenwriters ambivalence about their relationship and her unwillingness to let go leads to a situation of violence, madness, and death.
