In the ancient dungeons near Rosenik, friends witness a strange conversation between two strangers. Then, under mysterious circumstances, the respected Professor Zvyaginov disappears from the city. Who kidnapped the powerful magician and why? And what does the closed and unsociable grandson of the main mentor have to do with this? Friends conduct their own investigation, wanting to find a solution. All secrets will be revealed on the Green Christmastide. Life in Zarechye will go on as usual: Mitya and Seva will finally have to undergo Initiation, and the younger sorcerers will have to receive the Runes of Distinction. And then everyone will have a grand celebration in honor of the Summer Solstice and the end of the school year. But will this be the end of the story?