Philadelphia heiress Tracy Lord throws out her playboy husband C.K. Dexter Haven shortly after their marriage. Two years later, Tracy is about to marry respectable George Kittredge whilst Dexter has been working for "Spy" magazine. Dexter arrives at the Lord's mansion the day before the wedding with journalist Mike Connor and photographer Liz Imbrie, determined to spoil things.
Marcus is a successful advertising executive who woos and beds women almost at will. After a company merger he finds that his new boss, the ravishing Jacqueline, is treating him in exactly the same way. Completely traumatised by this, his work goes badly downhill.