The Paper Sisters travel to Romania to retrieve a book stolen during the fire at the British Library four years ago. While attempting to infiltrate Professor Webber's castle, their powers are partially stripped by a strange force surrounding the castle, and they are attacked by strange animals. Maggie grows excessively depressed while Anita grows extremely frustrated and begins to pick fights with her sisters, then runs off. The three finally find Professor Webber's central chambers, where they discover he has been weakening their abilities and playing on their emotional weaknesses with the influence of ultrasonic and subsonic waves. Michelle finds herself partially immune because of her general sense of calm, and the Sisters find a way to defeat the sonic attacks. Anita kills Webber and they flee. An already injured Maggie protects Anita from Webber's vengeful servant Irving, and Dokusensha agents Kim and Sonny Wong help the sisters escape the castle.