1919. Two corpses are found on the Prague Express. The next day, the private detective Ardashev is asked to search for the missing wife. An investigation that seems ordinary at first turns into a cascade of dangerous adventures and complex forensic research. He must not only uncover the mystery of “Laura Without a Head,” but also find a connection between explosions that shake Prague, a bank robbery, an artifact from the time of Catherine II, the Freemasons, and the suicide of a Russian aviator. The enemy is nearby. He is inventive and dangerous. Will it be possible to come out victorious? And what price will have to be paid for it?