The Musketeers are tasked with bringing the fearsome Labarge, a regional intendant under arrest for the murder of two Musketeers, to Paris. The Red Guards, resentful of the Musketeers' handling of him, initiate a vicious fight between the two regiments. Fed up with the disruptive rivalry between the Musketeers and the Red Guards, the King calls a contest to prove which group is the stronger. D'Artagnan is determined to be chosen to fight so that he can prove himself worthy to be a Musketeer.