42-year-old Manhattan native Isaac Davis (Allen) has a job he hates, a seventeen-year-old girlfriend (Mariel Hemingway) he doesn't love, and a lesbian ex-wife Jill (Meryl Streep) who's writing a tell-all book about their marriage... and whom he'd like to strangle. But when he meets his best friend's sexy, intellectual mistress, Mary (Diane Keaton), Issac falls head over heels in lust! Leaving Tracy, bedding Mary and quitting his job are just the beginning of Isaac's quest for romance and fulfillment in a city where sex is as intimate as a handshake - and the gate to true love... is a revolving door.