The soft tread of a cat's paws and the firm, confident step of a warrior dressed in agate-black armor. A sweet, soothing voice that speaks healing tales and an unblinking gaze that can turn anyone into stone. What is he really like - Mokosh’s many-sided companion, who can take on any form if desired? Svarga, which was once a single whole, is split into three Worlds, increasingly separated from each other. Who is to blame for these changes? This is exactly what Kot Bayun, a skilled scout and tracker, has to learn. The one who stalks in the night has picked up the trail, and woe to anyone who gets in his way. Even if his opponents are the creations of a nameless Enemy, who decided to reshape the Universe according to his whim. In the book we will get acquainted with Slavic beliefs about Poludnitsa and Midnight, we will learn how to resist spirits that can bring a lot of trouble to the human race. One of the chapters of the chronicle is devoted to the ancient Indo-European myth about the struggle between the Thunderer and the Snake who steals fat herds.