Bud Baxter is a minor clerk in a huge New York insurance company, until he discovers a quick way to climb the corporate ladder. He lends out his apartment to the executives as a place to take their mistresses. Although he often has to deal with the aftermath of their visits, one night he's left with a major problem to solve.

On one random day in the San Fernando Valley, a dying father, a young wife, a male caretaker, a famous lost son, a police officer in love, a boy genius, an ex-boy genius, a game show host and an estranged daughter will each become part of a dazzling multiplicity of plots, but one story.

Guido Anselmi, a film director, finds himself creatively barren at the peak of his career. Urged by his doctors to rest, Anselmi heads for a luxurious resort, but a sorry group gathers—his producer, staff, actors, wife, mistress, and relatives—each one begging him to get on with the show. In retreat from their dependency, he fantasizes...

A retired San Francisco detective suffering from acrophobia investigates the strange activities of an old friend's wife, all the while becoming dangerously obsessed with her.

Paul Rivers, an ailing mathematician lovelessly married to an English émigré; Christina Peck, an upper-middle-class suburban housewife and mother of two girls; and Jack Jordan, a born-again ex-con, are brought together by a terrible accident that changes their lives.