In an abandoned house on the outskirts of Saint-Marco, during a ritual of black magic, an unknown sorcerer tried to sacrifice a child, but the boy miraculously managed to escape. It turned out that this kid is the eighth Count de Fortin, and suspicion of kidnapping and attempted murder falls on his uncle Baron de Bellegarde, whom many consider a sorcerer. Since the child is saved, and magic is not within the sphere of interests of the secret police, Marc de Segur is not going to deal with this case. However, subsequent events and the king’s personal order still force him to take it up. In the investigation, he joins the magician of the White Tower, Philbertus, who is sure that it was Baron de Bellegarde who violated the royal law on witchcraft by attempting to perform a bloody ritual in the capital. However, Mark does not really believe in the guilt of the young count’s uncle. Subsequent fatal events further confuse the situation, in which the truth is hidden behind a wall of lies. In this investigation, Mark is again helped by the nine-tailed fox Lee Jin H.