Tells the story behind an assassination attempt perpetrated in 1897, by a dipsomaniac man, against the President of the Mexican Republic, General Porfirio Diaz.

During the Mexican Revolution, Leandro and Odón, two war vultures, find a zebra. They mistakenly believe this to be an American horse and thus begin a journey in search of General Obregón, who they assume, will appoint them as colonels given their peculiar beast of burden. They partake in several adventures during their journey.