A millennium ago, Earth was plagued by wicked beasts of every sort. Solely the great priest, Ozuno, possessed the ability to tame the guardian demon known as Zenki and guard the world. Fearing that Zenki's destructive nature would never be harnessed, Ozuno entombed the creature in a stone monument before his passing. Presently, a youthful priestess named Chiaki Ozuno unearths the monument. Bizarre demonic objects, dubbed the Seeds of Evil, have resurfaced, heralding calamity for all humankind. Chiaki's sole hope rests in summoning Zenki! Will she succeed in controlling him, or will salvation for Earth come at the price of her own destruction?