 In XVI century Nueva Espana, mysterious swordfighter Cruz Diablo (a sort of spanish Robin Hood) terrorizes rich people with his signature, a cross made with his sword in people s forehead. Knowing that evil Diego (Pereda) is being taken for Conde de Luna and that he is planning to marry his daughter Marcela (Gallardo) with old Marques de la Florida (Martinez), Cruz Diablo (who is Nostromus, the real Conde de Luna and Marcela s father) intervenes to resolve this complicated situation.