Alfred Kropp is fed up with dangerous adventures. Having inherited his father's fortune, he hopes to continue living the normal life of a teenager. But the dream is not destined to come true. Again he is in a dizzying whirlpool of events, again at every step he is exposed to mortal risk. What caused the trouble this time? The Seal of Solomon, which Alfred kept for himself, not entrusting control over demons to the Agency of Interdimensional Paradoxes and Unexplored Anomalies? Or revenge for the murder of Mogar, leader of the dark forces? Or a skull with the ominous number thirteen, rumored to have been made by Merlin himself? For the first time in Russian!