Mexico at the time of the Revolution: John Mallory is an Irish terrorist who has fled to Mexico and works for a mining company as an explosives expert. Juan Miranda is a Mexican bandit and leader of his family gang. His lifetime dream is robbing the bank of Mesa Verde and he blackmails John into joining him. The Irishman plays a trick on the Mexican who finds himself involved in the revolution. But the trick is nastier than expected: Miranda’s family is exterminated by the Governor’s army. Mallory saves the Mexican who finds himself fighting against the regulares and against his will, Juan has become a hero of the Revolution. Miranda and Mallory have become great friends, but right when Juan needs John the most, the latter is shot in the back and he blows himself.