The Druids Gwenc'hlan and Taran investigate the disappearance of Ronan's family the blacksmith found in his home. Leonin le Tiern thought that this was the package of a few Saxons. A hypothesis quickly ruled out when they discovered the corpses of a clan of Saxon. Honey, the young woman who was to marry the eldest of Ronan's children, thinks that the culprits are some demons. Taran admits that he was inclined to believe it, too, because he feels like a presence in the forest. A forest that is not without frightening his master. There is also this man found buried up to the neck in the village of Kermené. A man alive but paralyzed by a drug. But the man suddenly disappeared during the night, and Gwenc'hlan also... Taran is alone, the forest is home to a dark mystery, underground galleries, ancient shrines and the lord of the castle of Orient as well, hides a heavy secret...