Mickey (voiced by Wayne Allwine), Donald Duck (voiced by Tony Anselmo) and Gao Fei (voiced by Bill Farmer), who dreamed of becoming musketeers from an early age, were just chores in charge of cleaning in Versailles when they grew up. Despite their low status and frequent mistakes, they are still optimistically looking forward to a better tomorrow. Meanwhile, the captain of the Royal Guard Pete (Jim Cummings voice) conspired to usurp the throne, so he designed to hijack Princess Minnie (Russi Taylor voice). Minnie, who was nearly killed, ordered Pete to increase the strength of the guards, who deliberately promoted the completely inexperienced Mickey to become musketeers. The dreams of three good friends came true, and Mickey fell in love with the princess at first sight. But in the days that followed, Pete began to usurp the throne. "one for all, one for all", adhering to this lofty belief, the three good partners face up to the difficulties.