February of 1913. Mexico City is a nest of traitors that conspire against Francisco Madero, first president of the Mexican revolution. The smell of a pronouncement is in the air. Based on the best seller by Paco Ignacio Taibo II "Temporada de Zopilotes" (Zopilotes's season) gets deep in, narrating the facts of the "Decena trágica" (tragic ten) that ended up with the assassination of president Francisco Madero.