Jaqueline, a girl in trouble with the law, dresses like a boy and joines the Musketeers to avoid arrest. She runs into trouble after an argument with D'Artagnan Jr yet wins the respect of the instructor and two of the other Musketeers, Ramon and Siroc. She soon discovers that her brother has been taken by the evil Cardinal to be used for experimentation by a secret society and sets out to rescue him. Along the way, she gains the help of D'artagnan, Ramon and Siroc, and D'artagnan discovers her secret.