The magical world is full of unprecedented secrets, amazing riddles, and enchanting witchcraft! But not everything is so simple in the magical forest where a boy named Seryozha—who came to the village for his vacation—ends up. This forest holds danger for the boy, because in its depths lives an unclean power. Yet not all representatives of the unclean force do evil. For example, the Forest Spirit and the Water Spirit became good thanks to Masha. But the witch Varvara and her clever helper, a cat named Mikoshka, don’t want to accept this. Varvara wants to rid the forest of goodness—and especially of her younger sister, Masha. Brave Seryozha disrupts Varvara’s plans, and good friends rush to help him: familiar characters come to life in a new way on the pages of the book. Through his exciting adventure, the boy learns what true friendship is, practices learning to help selflessly, and believes that courageous actions can defeat even the most dangerous treachery.