A strange autumn came, and snow began to fall on the leaves that had not yet fallen. Incomprehensible events begin in St. Petersburg. At the school where Liza Kudryavtseva, aka Princess of Radinglenskaya, studies, a competition begins for participation in some mysterious film. The water in the Neva rises, talking rats appear on the streets, and bronze lions come down from their pedestals. Evil has taken on a new guise, and now the fate of not only Radinglen, but also St. Petersburg depends on Lisa and her friends.