In the second film of the medieval crime scene, the night watchman is frightened by a terrible ghost - the tragically sunken daughter of a rich merchant. In the morning, a guard is killed in a high tower and several more people die in suspicious accidents. Melchior's paths investigating these events intersect with both the amusement girl and the priest, as well as the foreign artist and the mad heretic. The clues take him to Pirita Monastery, whose gloomy vaults hide a dangerous secret buried in oblivion. Meanwhile, Melchior is plagued by the mystery of why his beloved Keterlyn suddenly breaks their engagement…