Gustav Old Red Amlingmeyer is an old-fashioned kind of guy: he prefers a long trail ride even when a train ticket can get him where he's going in one-tenth the time.
His brother Big Red, on the other hand, wouldn't mind climbing down from his horse and onto a train once in a while if it'll give his saddle-sore rear end a rest. So when it's Old Red who insists they sign on to guard the Pacific Express, despite a generations-old Amlingmeyer family distrust of the farm-stealin, cattle-killin', money-grubbin' railroads, Big Red is flummoxed.
But as usual, he'll follow his ornery brother just about anywhere.