Long ago, a ritual was performed by the order of Templars. As a consequence, a dark, terrifying new power was obtained. Terrible things started to happen, and many lives were lost; it was then decided that this new power would have to remain a secret. But no secret remains forever untold… The end of the 12th century is imminent. The Pope launches a fourth crusade in order to conquest the holy city Constantinople. The young Templar Denz de Bayle, with his companion the thief Esteban, will join the crusade in order to find his father, who never came back from the last crusade. Denz will find the truth during a journey through the greatest city of medieval Europe and Orient.