Fujimaru and company are dumbfounded by Gilgamesh's sudden visitation of the Chaldean Embassy. There, they are given a new request from the king which is to investigate the Persian Gulf. Merlin and Ana cannot join as they have no travel permits. In other words, this will be Fujimaru's first journey alone with Mash in a while. But there sat the noble king, reciting a poem and cocking his head in contemplation. Having fun with tales of the past, Fujimaru and company's journey will finally become a lively one.

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.