Married couple Lucy and Jerry Warriner both suspect the other of cheating and find themselves in divorce court. The divorce is granted - the only point of contention is who gets their dog, Mr. Smith. They soon have significant others. Lucy starts seeing her neighbor from across the hall, Daniel Leeson while Jerry is seeing Barbara Vance. The two are soon going out of their way to sabotage the other's relationship. Having succeeded, Jerry and Lucy find themselves alone in a country inn realizing the mistake they've made.