Railroad fireman Bill White is a carefree ladies' man with an irresponsible streak. His buddy Jack Kulper, an engineer, is more solid and reliable. Bill comes to stay a while with Jack and his wife Lily. Bill and Lily fall in love, but not wishing to hurt Jack, Bill leaves without explanation. When Jack confronts Bill about his suspicions, the two fight and Jack is seriously injured. Bill is consumed with guilt and tries to make good, but Jack has his own ideas about that.