Fate/Grand Order Absolute Demonic Front: Babylonia

The year 2010 AD. Romani Archaman has been posted to Chaldea. There, he becomes the primary doctor for a young girl. Mash Kyrielight, Chaldea's second successful summoning experiment, is interested in the word "Senpai." The interaction between the two gives Mash a reason to hope. That hope becomes a wave and starts to spread. That is your story, the story of a normal "somebody." The story at the beginning of a journey that weaves the future.

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 could not save, who then suffered at the hands of the King of Mages. Even still, Fujimaru finds himself questioning his own decisions. Meanwhile, Gilgamesh dispatches him to investigate the city of Ur under royal orders. While traveling to their destination, the group comes under attack by a creature striking out of the blisteringly hot depths of the jungle! Though nearly led astray by their attacker and the constant battles, Fujimaru and company arrive safely in Ur. There, they are astonished to find that, contrary to what they had been led to believe, the citizens of Ur lead quiet lives. However, that peace hides a secret... Ultimately, Fujimaru is forced to make a difficult choice.

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.