 Matt Dillon (James Arness) and his prisoner, Waco Thompson (Victor French), begin the trek to Dodge City, where Waco is wanted for robbery. Along the way they find a young Kiowa woman, One Moon (Pat Thompson), who is about to have a baby in the wilderness. Matt and Waco must help her while eluding four ex-henchmen of Waco who are bent on revenge for his duplicity. Harry Carey Jr. and Louise Latham play important roles in the action.