For ages, it was believed that during the Yule-tide days the boundary between the world of people and the world of spirits becomes thinner. That’s why, on these days, people would arrange divinations—sessions for contacting otherworldly forces. What could be more thrilling than looking into the face of the future? Even if it’s scary—still how fascinating! But what if the summoned spirit insists on trouble, and in the native school suddenly strange and frightening things begin to happen? Yan Orlov decides to разобраться with it. Soon he will understand: danger really exists. And it comes from ancient underground dungeons located under the school building…