Fujimaru successfully retrieves Gilgamesh's clay tablet, and within a deep slumber, he remembers his encounter with the King of Mages in London, the Fourth Singularity, which renews his understanding of the importance of the final Holy Grail. Meanwhile, Merlin suspects that the Demonic Beasts at the Northern Wall are planning a large-scale attack, and takes Fujimaru and company to the Northern Wall. There, they see a squad commanded by Leonidas I putting up a struggle. Once there, Fujimaru and company hear from Ushiwakamaru that communication with the fortress city of Nippur to the north has been severed, and they head out towards Nippur.

After making peace with Ereshkigal, goddess of the underworld, Fujimaru and the others return to Uruk to find Gilgamesh, who has returned to the land of the living. As the final battle with Gorgon approaches, Gilgamesh proposes a strategy that may give them a chance at victory.