New York City music executive Harry Langer (Nicholson) is a man of some age and experience who generally dates younger women. His world is turned upside-down, however, when he has a heart attack while visiting the East Hampton beach home of the divorced playwright mother, Erica (Keaton), of his latest trophy girlfriend, Marin (Peet). With his girlfriend having gone back to the city, Harry is left in the care of Erica and his doctor (Reeves), but the two men soon find themselves competing with each other, as they both fall in love with Erica.