Imprisoned and tortured in Rouge-Palais, Lynche, Raya and Isan manage to escape from the den of Myrogl, a monstrous snake-man who was sleeping in the bowels of the fort. Outside, they decide to join the humanitarian caravan to inform their former friends, Moon, Bardin and Linnah of the imposture of Yquem and his troop. They want to rally them to their cause and recover the treasure engulfed in Lake Placid during the attack that saw the entire family of Lynche disappear...