For many centuries, a mysterious deck of cards has interfered with human destinies. According to legend, she was the receptacle of the powers of the great sage Hermes Trismegistus. Through magic cards, the spirits of the sage and his faithful servants called for justice: they protected virtue and punished sinners.Thousands of years later, amateur detective Nadezhda Lebedeva, investigating a series of murders that swept through St. Petersburg, discovers that the victims seem to correspond to the merits and suits of playing cards. Is the ruthless criminal and his victims connected with the incomprehensible magic of the ancient deck? King, Queen, Jack… Do people play cards or are cards played by people? This is what Ms. Lebedeva has to figure out.