The army officer's sweetheart, forced by her father to wed the wealthy baron, discovers that her husband is in reality Fatia Negra, the notorious masked bandit. The bandit and his men attack a treasure train and seize the gold. The soldiers, guided by a peasant woman whom the bandit has persecuted, attack his stronghold and recover the treasure. Fatia Negra kills himself, and his widow is reunited with her soldier lover.