John Mason (John Wayne) returns home to see his father, a freight line agent, only to stumble into a robbery that ends up with his father killed and him wounded. Nursed back to health by his new friend's favorite girl, who he has feelings for; Mason vows to track down his father's killer, who also happens to be the brother of his nurse. Mason finally discovers the killer's identity and heads off to confront him, but is unaware that his gun is empty, the bullets taken out by his friend, who is jealous of his girl's feelings for Mason.