A middle-aged postmistress falls for an engaged man during a convention in New York.

Evie Jackson, a smalltown postmistress whose compulsive friendliness causes men to avoid her, arrives in New York City to attend a postmasters' convention and meets Harry Mork, a recently-promoted greeting card salesman staying at the same hotel. Harry, who is engaged to Phyllis, a widow from Altoona, Pennsylvania, looks forward to settling down after years on the road. Like other men, he is wary of Evie, but after an unhappy rendezvous with June, a magazine salesgirl, he accepts Evie's invitation to a party. He enjoys her company, and she begins to fall in love with him. Evie learns of Harry's forthcoming wedding when he takes her to see the apartment he has rented for himself and his wife, and she decides to return home. Phyllis arrives in New York and visits the apartment with Harry. They find Phyllis' teenaged son, Patrick, living there with his beatnik girl friend, Zola, and learn that the boy plans to stay. Phyllis announces that she prefers to live in hotels because she is tired of housekeeping, and it becomes apparent that she plans to marry Harry to unburden herself of responsibilities and chiefly of the problems involved in raising a son. Harry leaves her and rushes to Pennsylvania Station in time to prevent Evie's departure.