1996. In one of the cities of Central Russia, a well-known local musical figure dies at his own dacha. The police do not initiate a criminal case, believing that this is a tragic accident. However, six months later, a series of mysterious deaths takes place in the neighboring regional center, giving rise to a confusing investigation. The investigation concludes that this is the work of a serial criminal. Someone seems to draw a perfectly even circle on the map, placing the victims according to the elements and signs of the zodiac. Who will be the next victim? How do you save people from a ruthless killer? Major of the Criminal Investigation Department Olesya Sergeevna Kiryak is looking for answers to these and many other questions. Will she be able to solve the incredible mystery of the sinister maniac? Are you sure you won't regret your new knowledge when the whole terrible truth is revealed?