Johnny was mentally traumatised when he witnessed as a child the killing of his father (a deserter) by a group of soldiers. As an adult he randomly kills every soldier he gets hold of, so that the army sends out the brutish Lieutenant Garringo to stop Johnny.

El Chuncho's bandits rob arms from a train, intending to sell the weapons to Elias' revolutionaries. They are helped by one of the passengers, Bill Tate, and allow him to join them, unware of his true intentions.