The staff of a private museum in the center of St. Petersburg, whiling away the evening, decided to evoke the spirit of Count Sutugin, the former owner of the local lands. He came, and at the same time, inexplicable and tragic consequences did not take long to come. Witnesses of the incident are convinced that the curse of the Sutugin family is to blame for everything: the count promised to come from the other world and punish his descendants, but there is such a person in the museum circle. Will the count's invisible hands get to him faster than Crusaders and his team will solve this case?

After the death of Konstantin Crusaders, an oppressive atmosphere prevails in the department that he headed. Moreover, they plan to appoint the "eternal duty officer" Anton Shchetkin as the head of the group, who is beginning to be persistently interested in the materials on Faust collected by Krestonosev. The situation in the department is being changed by a new task assigned to Morozov and Masha. A manhole with an ominous inscription is found in the building of an ancient manufactory. And, as it soon turns out, these words will turn out to be prophetic...