When the U.S. invasion and the landing of troops in 1847 begins, the former cadet Miguel de la Peña (Jorge Negrete) and his friend Agustin Melgar (Jose Macip) decide to return to the military college and fight heroically in the defense of the Mexican army.

Miguel de la Peña

Mercedes de Zuñiga y Miranda

Agustín Melgar

Ana María de Zuñiga y Miranda

Rafael Alfaro

Don Pedro de Zuñiga y Miranda

Doña Nievez de Zuñiga y Miranda

Luis Manuel Martínez de Castro

General Nicolás Bravo

General Monterde