It has been more than a thousand years since the legendary battle against the Heavens. In the Underworld, the demons lived an evil, but fulfilling life in peace. Until Trillion, a demon god of destruction, appeared and sought to consume the world. Boasting unfathomable power, the god annihilated the Underworld's forces — including the Great Overlord, Zeabolos, himself. Facing death, Zeabolos heard a mysterious voice from deep within, which told him it was too soon for the lineage of the Great Overlord to fall. With that, Zeabolos was revived, patched together and gained the power of the Soul Grimoire to fight the powerful God. It's time to grab your PS Vita, assume the role of Zeabolos, and fight to save the Underworld from destruction at the hands of Trillion: God of Destruction.