Kiyo, Zatch, Megumi, and Tia made an appointment at go to an amusement park. On the way there, Megumi and Tio enter a clothes shop and meet a person named Maryl Caruno who asks Megumi if they can trade clothes for a while. Megumi agrees and after the trade, Maryl leaves with Megumi`s wallet and book. Megumi chases her but is stopped by a butler who reveals Maryl recently became queen and that assassins are after her. They search for her but Megumi is captured by the assassins who mistook her for the queen. Tia finds Maryl and tells her what has happened to Megumi. Maryl decides to risk her life to save Megumi, but is saved by Tia. The assassins were then captured and Maryl thanks Tia for her help.