A film for the youngest, inspired by the classic novel by Alexander Dumas, based on an animated series loved by children on several continents. The young Dogtanian dreams of following in his father's footsteps and joining the king's guard. In search of adventures, he goes to Paris with Sandy the horse. He is accompanied by Pic, a clever and talkative mouse who is great as a squire. After a daring display of their skills, the Dogtanian gains the respect and trust of three famous musketeers: Atos, Portos and Aramis. These brave canine four will have to defend the king from a plot by the wicked Cardinal Richelieu to seize power. Will Dogtanian manage to become a musketeer and win the heart of beautiful Juliette? This dog team will conquer cinemas! One for all, all for one!