When her grandfather has a car accident, Isabel 11 takes on his search for the sword that has been promised to her ancestor centuries ago by the world famous musketeer D'Artagnan. Assisted by her nephew Rik 12 and friend Jules 13, she will need just as much bravery, loyalty and perseverance as the illustrious musketeer to find his lost sword, to save her grandfather and to reunite her family.