One day Bonacieux, owner of the house the musketeers and d'Atragnan live in asks them to search his young wife Constance who serves Anne of Austria.

However, Milady de Winter, a spy for Richelieu who serves Anne under the false name of Charlotte schemes the queen to wear a necklace at a ball to be held one week later.

At the same time, Milady tries to revenge the musketeers and seduces Bonacieux to kidnap his wife Constance but Aramis saves her and she is sheltered in a convent.

On the other hand, d'Artagnan is worried about the request of leading the Guards of Richrlieu and his isolation from the three musketeers for he never hears of the kidnaping of Constance and what Aramis does for her.

Both the Guards of Louis XIII and that of Richelieu march to La Rochelle but are forced into a hard fight against the Protestant rebel supported by the Duke of Buckingham and d'Artangan and his soldiers are commanded to spearhead.

Porthos, who becomes shell shock at La Rochelle gets back his health by Madame Coquenard's dedicated care and marries her.

[3] Before writing the script of "The Three Musketeers", he discussed appearance of the puppets with Bunta Inoue and was concerned in selecting the voice actors/actresses also.

[5] Koichi Yamadera voices six characters as Athos, Louis XIII, Rochefort, Patrick, Duke of Orléan and Planchet.

In addition, Bonacieux crosses the Channel using washtub as a boat while Milady cooks unappetising stew for d'Artagnan whom she falls in love with.

And the ending theme "Hitori ja nai" (You are not alone) expresses the bonds of friendship, especially that of d'Artagnan and the musketeers and the words are written by Mitani.