Thirteen years ago, Mila Rudik, along with four other wizard children by birthright, was kidnapped by the Guild-organization, which for many years hunted magicians, each time leaving a Black Mark next to a new victim. In the end, the kidnapped children were freed from captivity, and the Guild was defeated. Now thirteen-year-old Mila will have to visit the city of wizards - Trollinburg. Together with her, the Black Mark will burst into the world of magic again.