After being challenged to a duel by a younger rival, d'Artagnan, Captain of the King's Musketeers, relates the story of how, in his youth, he travelled from his rural home to Paris with the hope of becoming a Musketeer. He describes how he immediately fell afoul of a plot by the traitorous Count Rochefort against King Louis XIV and joined forces with the celebrated 'Three Musketeers' to defeat the plot and bring the King's enemies to justice.