Alternative Europe, 18th century. The founder and head of the bureau for countering obscurantism, Mr. Frederic Kisling, receives an alarming letter: “Dear learned gentlemen! I ask you to forgive with your humility the unblog-like courage with which I dared to tear you away from academic pursuits and all sorts of benefits and write you because you have no strength to endure and your soul is ossified from grief. Jacob Ragged Cheek writes to you, vomiting in tears, begging you to come as soon as possible before the bloodsucker bleeds all the babies of Lost Suponya. Three innocent children have already gone to the Lord, not having had time to know beyond the breasts of their mother, childhood, adolescence, and maturity. Our village is quiet and there has never been such grief; tears flowed only over the coffins of decrepit old men and old women with sunken cheeks. White babies are shedding tears, watching angels, heavenly mothers tearing out their hair. Louise had already drowned herself; she was pulled out of the well three days later and was swollen. Fear is now here in Lost Supony forever. Parents do not know how to protect their child from the fierce beast. Come save our village Lost Supon and destroy the devil's seed. There is no longer any possibility of suffering innocently. Fear is here forever now. Jacob Ragged Cheek. (big blot)."Together with his faithful student Balthasar Klaus, Kisling goes to the village of Lost Supony to stop the obvious obscurantism and find the real killer, who undoubtedly is a man. What Kisling and Klaus had to experience in Lost Supony exposed them sanity and rationalism are put to the test.