D'Artagnan, an inexperienced Gascony youth, travels to Paris to join the elite Musketeers of the Guard. On his way, he encounters a mysterious lady at a roadside inn. When he picks a fight with one of her escorts, she becomes suspicious and has him knocked unconscious. His letter of introduction from his father to de Treville, the commander of the Musketeers, is burned. When he awakens, he continues on to the city.