Sam is trying to break a bronc when a man named Orville Kilroy wanders into the ranch with a saddle looking to buy a horse. Blue tries to take advantage of him by selling him the bronc but the joke is on the men when Kilroy breaks the bronc. Buck knows Kilroy spent time in prison for robbery but decides to take him on as he is a good hand. Kilroy proves to be the guy everyone likes. He can handle a practical joke, teaches Blue to shoot, and provides Big John with a chess player who can beat Big John. However, Telford Burris and his two sons are on the trail of Kilroy. They finally reach Tucson where Kilroy along with Buck, Blue, and Manolito have come for supplies. Telford asks Buck in the saloon if he has seen Kilroy in the area. Buck says no but leaves to warn Kilroy but it is too late as a son has seen Kilroy. As the men come for Kilroy, Blue wants to help him but Buck realizing Kilroy is wanted says no. Kilroy confronts the men but when Telford threatens to kill Kilroy because he lost the money they robbed, Buck followed by Manolito stops him. Buck reluctantly turns the four men over to the sheriff while back home Big John ponders when Kilroy will be available to play chess.
—Anonymous