A funpacked film full of sex, swordfighting, and adventure. Set in the 17th century, Louis of France is about to marry Princess Marie-Therese, the Spanish Infanta, in order to keep the peace between the two countries. But he does not want to lose his mistress. As his popularity worsens, with death threats hanging over him, he kidnaps a lookalike and has him tried for murder in order to deceive the people of France. The lookalike, however, is a protege of D'Artagnan and the Musketeers, and so is rescued by them. In the meantime Louis has fallen in love with the Spanish Princess and she with him.