Western stories. James Buckley Armstrong, or Buck to his friends, has been asked to look after a company of palaeontologists as they search for dinosaur bones on rangeland owned by Big John Calhourn. Stumbling onto a bunch of rustlers is only the first problem he faces. Called a rustler and a liar by Big John's stepson, Buck is saved by the rancher's older son, Cord, after being kidnapped and left to die. Then a stagecoach hold-up is blamed on Buck and Cord and the manhunt is on. Only when mysteries are solved and questions answered can Buck win though.