Anyone who has an unusual hobby is vilified, despised, mobbed and excluded by his or her surroundings. The 15-year-old student and passionate hobby archaeologist can tell you a thing or two about this. Beatings, destruction of her work and bullying are part of her everyday life. Nevertheless, Erika is bubbling over with enthusiasm about the results of her work. How does everything change when the two worst despisers of all show interest in her work. They lure Erika into a completely new mystery in the shape of an ancient castle, about which there is no record, despite its proximity to the royal city of Dorphane.