College professor John Hathaway (Don Ameche) is writing a book about jealousy, and how he doesn't believe in it.

He isn't the least bit perturbed, for example, when his lovely wife Julie (Rosalind Russell) is the object of desire in the eyes of the school's football star, Rubber Legs Ryan (Gordon Jones).

Elliott is infatuated with John's wife Julie, but after a while, he realizes that she is faithful to her husband.

Elliott's failure to help him or to contact lawyer Freddie Bond, as promised, is maddening to Julie, who wants John to knock his block off.

By the time a total stranger calls his wife "sugar" on the street, John is ready to come up swinging.