Mary Halstead is in search of a son she gave up a long time ago. With months to live, she comes west on the trail of someone who could be her son, but he may also turn out to be a notorious outlaw.
The Laramie Kid's gang captures a young man Tom who steals a gun and fatally wounds the Laramie Kid. They try to hang Tom but a posse forces the gang to leave him. The wagon train finds Tom and Mary Halstead who is looking for her abandoned son nurses him back to health. She has only a few months to live and has come west to see what progress the lawyer Ferguson has made in finding her son Earl. Eventually events lead Tom to realize he killed Mary's son Earl who was the Laramie Kid. Tom tries to hide the truth about Earl from Mary but Ferguson tells her the truth. The gang captures Tom and Mary is forced to try to save him.—Anonymous