Sent to prison by the combined efforts of the Cisco Kid, Pancho and stageline owner Bill Shannon, Larry Martin serves his time and emerges determined to get revenge on the three, particularly Cisco. Martin had perfected a lightning draw, using a dummy gun he secretly made while in jail. He challenges Cisco to meet him. Cisco does and beats Martin to the draw and orders him to get out of town. Martin, refusing to admit defeat, makes off with a valuable gold shipment, and sets a trap he hopes Cisco and Shannon will fall for. Cisco sees through the trap, and Martin and his followers meet their just deserts.