After several years of domestic squabbles, the marriage of Nina and Robert Tracy (Judy Holliday, Jack Lemmon) goes "phffft"! Upon receiving their divorce papers, Nina and Robert are certain that they'll remain friends, no matter how many new lovers they pick up along the way. Nina dallies briefly with bombastic Charlie Newton (Jack Carson), while Robert has a fling with the luscious Janis (Kim Novak). These romantic episodes only serve to make Nina and Robert realize how much they're still in love with each other. According to costar Jack Lemmon, the original title of this film was Phfffft!, but after an all-night bull session at Columbia Pictures it was decided to take out one of the "F"s.