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.

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