The Spaniards under Charles V aim to occupy all of Italy with the help of traitorous allies like Don Lorenzo. Lorenzo conspires to marry off his supposed niece Isabella to Charles V’s nephew, Prince Rodriguez, to confirm Spain’s dominance. The Black Devil, a heroic masked avenger, falls in love with the fake Isabella and takes vengeance on Lorenzo with the help of his friend Ruggerio and his men.
A humble young woman takes care of his sister's child while also hiding her feelings towards her sister's lover.
Count Ubaldo desires to make an unfavorable alliance with the Spanish armies. When Riccardo refuses to go along with the plans, he is ambushed in the forest and left for dead. However, he returns with a vengeance, organizes a band of marauders, and begins to pick away at Ubaldo’s forces. But Ubaldo kidnaps Laura, and Riccardo must storm the castle to free her.
