A brilliant plan, and everything is thought out to the smallest detail . First, a pack of rats floods the city, arranges its inhabitants a cheerful life, and then there is a simple boy with a horn (accompanied by a striped cat), for good money brings rats out of the city, and everyone is happy. The money is then divided between a cat named Amazing Maurice (retired with a house and a kind old lady). A clan of rats (for the creation of the Rat Republic) and a boy , and most of the paws of the selfish cat , because it is his criminal talent that the operation owes its success. But one day the plan goes awry. In Dryan-Blinzburg, in the lands of Uberwald, they encounter Zlokoznyi Grimm (granddaughter of the same Grimm Sisters), with Rat No. 1 and Rat No. 2 and for dessert - with a real Magic Dove . And in the basements and dungeons there is something dark and terrible .. Darkness claims its rights, and none of the Scientists of the Rodents knows how to resist it, and someone must sacrifice his life...