Major Masha Lyubimova encountered such a strange criminal for the first time - he left a barcode tattoo on the victim’s body. Having considered it, Masha and her colleagues went to a page on the Internet and received a message from the killer, who called himself the Actor. He promised that he would soon deal with one of the employees of the task force... Gleb Korsak was furious: how could he allow Masha to be kidnapped almost before his eyes! Soon Gleb received a message from Litsedey and, following his instructions, became the owner of one of the editions of the ancient “Black Book”: according to legend, if you collect all four copies together, you can summon the devil! A new letter from the mysterious criminal was not long in coming: he demanded a book in exchange for Masha’s life...