Barbie goes to Paris to become a musketeer. Once she arrives, she is denied and begins work as a maid. While working, she meets three other girls who also want to be musketeers. They join together and find the tunnel to the location where musketeers train. Different incidents begin to happen and Barbie and the other three girls show their musketeer skills.
A ball is planned to happen at the palace. Barbie and her friends find out someone is going to try and kill the Prince at the ball. Barbie and the Three Musketeers band together to save the Prince.