War was once a simple thing for the warriors of Sais and Tanis, but the sudden reappearance of angels and demons have changed the meaning of the words friend and foe. An ancient evil returning to destroy all living things causes the longtime rivals to unite in order to prevent the fall of the world; however, the bitterness of their past rivalry hinders their progress.

Hypierion tells the riveting story of how Prince Hondo of Tanis and Princess Theoris of Sais take on the daunting task of redeeming the past as well as securing the future. Together, the unlikely pairing must face hordes of demons, shocking revelations, and their own fears together in order to save the world.