After an attack on Re-Estize's capital city, the Guardians of the Great Tomb of Nazarick return to their master Ainz Ooal Gown. They have been preparing for months and are now ready to put their plans into action, which aim at world domination. As Ainz's war machine grows stronger, other parts of the world continue to operate normally. The prosperous Carne Village, which Ainz had saved from destruction earlier, still thrives despite facing numerous threats. Meanwhile, in the northeastern Baharuth Empire, a powerful leader known as the Bloody Emperor is planning to challenge Nazarick's growing power. There will be battles, sacrifices, and rising nations. Is there anything or anyone that can stop Ainz Ooal Gown from achieving his ultimate goal?
Overlord III adapts novels 7 to 9.