Fate/Grand Order Absolute Demonic Front: Babylonia

At Chaldea Security Organization, the final Master of humanity Ritsuka Fujimaru and his Servant Mash Kyrielight have journeyed through six regions of differing eras in order to retrieve their future lost due to the "incineration of humanity" caused by the Mage King. And now, to repair the final Singularity, the pair head forth into ancient Mesopotamia. As soon as they land in those lands where the gods exist on an everyday basis, they are assaulted by an overwhelming number of Demonic Beasts. And just as suddenly, a beautiful girl descends down from the sky.

Fujimaru and Mash head for Uruk, led by a young man named Enkidu who has volunteered to be their guide. However, within the deep forest, Mash feels an ominous feeling in the air as Enkidu walks down a path different from the direction of their destination. Before them, an aloof couple – a man and a girl – appear before them. And with one phrase from the man, the hidden secrets of Enkidu come into light...

Fujimaru's entourage successfully has an audience with the wise king Gilgamesh ruling over Uruk. Fujimaru suggests to Gilgamesh that he wants to receive the Holy Grail that is causing this Singularity in return for defeating the Three Goddess Alliance that is putting all of Mesopotamia into a panic. However, Gilgamesh declares that he will not need the assistance of Chaldea for Uruk to face its perils. The situation turns extremely delicate, but then, Ishtar, the patron deity of Uruk, suddenly intrudes upon them, and they all end up in battle.

Fujimaru recalls his journeys in the other Singularities, particularly the regret he feels for those he couldn't save. Fujimaru finds himself questioning his decisions. Meanwhile, Gilgamesh dispatches him to investigate the city of Ur under royal orders.

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.

Finishing up the investigation at the Persian Gulf, Fujimaru and company are given a new order from the king. The new order is to retrieve a clay tablet that Gilgamesh had previously lost in the city of Kutha. Kutha was a city that suddenly disappeared after the emergence of the three goddesses, where every citizen had passed away. In such a quiet town, the entourage decides to split up in search of the tablet. Fujimaru suddenly wanders into a very frigid world. It is what people call "the underworld," a space separate from the physical world.