An old notebook filled with unique knowledge of physics was left to the family of Vasily Letunovsky by a refugee who died before the end. He had been fleeing the war. He asked that it be passed to the Academy of Sciences, because it contains important information that must not fall into the hands of the fascists… As people say in the dormitory of the teachers’ institute, the teacher Olga Semyonova was attacked by the very real kikimora—a representative of the unclean forces. The kikimora demanded something from Olga Vasilyevna and, not receiving what she wanted, killed her. The deceased’s colleagues, Alexander the First and Alexander the Second, don’t believe in mythical monsters and decide to figure out what happened themselves…