This is a story set in the Alpha World, sometime around the 132nd year of the Suzaku Calendar.
Robert? Lekroft? Ivanovich, one of the members of the Dragon Clan Inspection Army's B Group, receives orders from his superiors to escort a cursed girl named Heliana to the desert of the Oshania Empire, where they must search for the remains of the Demon King Shabolili. Hidden within Shabolili's remains is a fragment of the Dragon King known as the Primordial Dragon Species. Its immense power is enough to attract the attention of any Outer God. To prevent an outside deity from being drawn in, the fragment must be fed to the Sleeping Dragon.
Furthermore, since Heliana is a soul vessel created by Shabolili, only she can locate the Demon King's remains, but there is also a chance that she could bring the Demon King back to life.