Two bandits mistake a zebra for an American horse while looking to align themselves with Álvaro Obregón's troops.

Leandro and Odon want to join Alvaro Obregon's revolutionary forces. To do so, they travel to the north of the country on a zebra that they found in a broken down circus, believing that it is a gringo horse. They have several adventures during their journey: they escape from women who enslave them, they meet General Quesada, who wants to found a New Republic, they get lost in the desert, etc. When they reach Obregon's army, a colonel thinks they are Villa's spies and puts Leandro and Odon to a hard test of loyalty.—Anonymous