Geoffrey Thorpe is an adventurous and dashing pirate, who feels that he should pirate the Spanish ships for the good of England. In one such battle, he overtakes a Spanish ship and when he comes aboard he finds Dona Maria, a beautiful Spanish royal. He is overwhelmed by her beauty, but she will have nothing to do with him because of his pirating ways (which include taking her prized jewels). To show his noble side, he suprises her by returning the jewels, and she begins to fall for him. When the ship reaches England, Queen Elizabeth is outraged at the actions of Thorpe and demands that he quit pirating. Because he cannot do this, Thorpe is sent on a mission and in the process becomes a prisoner of the Spaniards. Meanwhile, Dona Maria pines for Thorpe and when he escapes he returns to England to uncover some deadly secrets. Exciting duels follow as Thorpe must expose the evil and win Dona Maria’s heart.