Harry Sanborn, a perennial playboy, develops chest pains during a romantic weekend with his latest infatuation Marin at her mother's beach house. He winds up being nursed by Marin's reluctant mother Erica Barry, a successful divorced New York playwright, and develops more heart pangs the romantic kind for her. But some habits die hard. When Harry hesitates, his charming doctor steps in and starts to pursue Erica. Harry, who has always had the world on a string, finds his life unraveling.