In the third film of medieval crime, Melchior’s wife Keterlyn witnesses a brutal attack. The life of an unknown young man is saved, but the victim who has lost his memory does not know who he is and how he ended up in Tallinn. The ring found at the scene guides Melchior’s nightly brotherhood, and a troupe of weirdos on Fair Day also raises questions. Frightening signs suggest that not only the unknown recovering from the assassination attempt is in danger, but Melchior and Keterlyn are also treating him. At the same time, the pope’s envoy, known as a ruthless witch-hunter, arrives in the city …