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.