 Mitch Wayne and Kyle Hadley, the playboy son of an oil tycoon, have been best friends since childhood. Kyle s wild sister, Marylee, hopes to marry Mitch, but he thinks of her as a sister. Marylee says that Mitch finishes everything Kyle starts. Mitch and Kyle both fall in love with Lucy, but she marries Kyle before Mitch can express his feelings. For a year after his marriage, Kyle stops drinking and behaves more responsibly, until he discovers that he may be sterile. Slyly, a jealous Marylee suggests to Kyle that Lucy and Mitch are lovers, and when Lucy finds that she is pregnant, a drunken Kyle accuses Mitch of being the father.