Young drifter Hal Harper rides into the remote town of Senora when he finds himself looking down the barrels of the law. What Harper does not realise is that the ruthless outlaw Tate Talbot and his gang have managed to get themselves elected as sheriff and deputies. Talbot has discovered that there is a wanted poster on his own head worth a small fortune so he has the ingenious idea of collecting his own bounty by killing the innocent Harper and claiming the drifter is the outlaw known as Diamond Bob Casey. Harper manages to escape to the remote uncharted desert south of Senora but can he survive in the Land of the Lost?