Follow veteran MMORPG player Momonga, who’s just been trapped in the world of his favorite game! Realizing the unprecedented power he commands, Momonga decides to bring glory to Nazarick and change the course of history.

Embracing his new identity and power as the fearsome overlord Ains Ooal Gown, Momonga continues to navigate the world of Yggdrasil in his quest to bring Nazarick to a new realm of glory throughout the game world.

Facing possible annihilation by the Demon Emperor's demi-human army, the Sacred Kingdom reluctantly seeks aid from the feared, undead Sorcerer King Ainz.