What do you know about maniacs? Only what they say about them on TV and on social networks - perverts with a sick psyche... But maniacs know everything about you. The most important thing is that they know your weak points and can take advantage of this. The operatives found a terrible picture at the scene of the first crime. An elderly moneylender and his feeble-minded grandson are both killed by slashing blows to the head. Blood and chaos in the apartment. What was the killer looking for? Criminal Investigation Officer Pyotr Zigunov does not yet know the answer to this question. Now he is more interested in the paper bundle clutched in the hand of the murdered old man. Perhaps this is a message that contains the solution to a brutal crime...