Madame de Ponsmaignan has decided to inherit more quickly the fortune of her beautiful family and her husband. Calling on the talents of Catherine Montvoisin, she poisons them and joins Paris with her son, Alexandre only rescued from the perfid massacre. Years later, Hannibal Meriadec the pirate, the sorcerer, son of Catherine Montvoisin, is eagerly searching for the key that will allow him to open the door that leads to the hidden world, the one in which he will find the blood of the dragon. But the key is to be held by a dead man. The enchanter Iweret killed once by the knight Lancelot. In this album, you will discover the events that bind Alexander de Ponsmaignan's past to the present of Hannibal Meriadec. A terrible secret guarded since then by the charismatic pirate.