In the reign of James the Second, in England, Carlos, a rover of the Spanish main, on a visit to Provincetown in the New World, meets Prudence, daughter of Captain Josiah and Temperance Hafley. He falls in love with the maiden, who is suffering from a strange malady which Carlos cures with precious herbs from his own realm, the Ever-Living Isles. The Puritan selectmen believe the Spanish tradesman to be a sorcerer, and banish him. Prudence runs to the edge of the shore, and as her lover's galleon sets sail, flings herself into the sea. Carlos turns back the ship, rescues Prudence, and tries to persuade her to go with him. But she wins him over, and together they go back to Provincetown. Carlos is captured, sentenced and is about to be hanged, when a messenger from King James brings a proclamation stating that no magician or sorcerer may remain within the colony. The Spaniard seizes his opportunity to escape. He claims Prudence as his bride.