Perla, a prostitute and the star in a miserable cabaret in the docks, falls in love with a sailor without knowing that he is her brother. Tomasa, Perla's mother, tries to prevent this incestuous relationship at all costs, but fails to do so. Set in a sordid environment, the director makes no concessions in this tragic love affair, which is narrated from three different points of view.

The plot follows a private detective, an ex communist and former CIA agent, who travels from Barcelona to Madrid to discover the identity of the assassin of the leader of the Spanish Communist party who was stabbed during a blackout while presiding over a meeting of the party's central committee. The film is a thriller with ironic political overtones.

Gálvez is a bumbling journalist investigating a real state shady business.

“El Héroe De Cascorro” is a peculiar Spanish silent film, a bizarre fact in itself for a country’s film industry scarce in interest or remarkable oeuvres. The film depicts the true, but dramatized, story of the brave Spanish soldier, Herr Eloy Gonzalo, rewarded during the Cuban war for his bravery defending the Spanish army position at Cascorro village.