Fate/Grand Order Absolute Demonic Front: Babylonia - Simuldub

The year is 2010 AD. Romani Archaman has been posted to Chaldea, where he becomes the primary doctor for a young girl. Mash Kyrielight, Chaldea's second successful summoning experiment, is interested in the word "Senpai."

As soon as Fujimaru and Mash arrive in ancient Mesopotamia, they are assaulted by a number of Demonic Beasts. 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.

Fujimaru's entourage successfully has an audience with the wise king Gilgamesh ruling over Uruk.

Fujimaru recalls his journeys in the other Singularities, particularly the regret he feels for those he could not save, and finds himself questioning his own decisions.

Fujimaru and company are dumbfounded by Gilgamesh's sudden visitation of the Chaldean Embassy. There, they are requested by the king to investigate the Persian Gulf.

Finishing up the investigation at the Persian Gulf, Fujimaru and company are given a new order from the king: retrieve a clay tablet that had been lost in the city of Kutha.

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.

Fujimaru and entourage, in order to rescue the people left behind in the fortress city of Nippur, begin their battle against the fake Enkidu who had been awaiting them.

Fujimaru and entourage have lost Ushiwakamaru and Leonidas I. With a "secret plan" given by Gilgamesh in hand, Fujimaru and company head over to Ishtar's temple.

Fujimaru and company greet Ishtar and gain information from Gilgamesh about the key for defeating Gorgon, "the Axe of Marduk" stowed away in Eridu within the southern jungle.

Fujimaru and company finally arrive at Eridu's Temple of the Sun to challenge Quetzalcoatl, one of the deities of the Three Goddess Alliance, to a battle.

Fujimaru and the others head to the underworld with Ishtar to defeat the goddess of the land of the dead and liberate Gilgamesh’s soul.

Fujimaru and entourage finally face Ereshkigal, the great goddess of the underworld. They ask her to save Uruk with them, but she refuses and attacks them instead.

After making peace with Ereshkigal, Fujimaru and the others return to Uruk. As the final battle with Gorgon approaches, Gilgamesh proposes a strategy that may give them a chance at victory.

With the Axe of Marduk, Fujimaru's party manages to weaken Gorgon by lowering her Divinity. Having opened a path for themselves, they finally reach the Blood Fort's depths.

After being robbed of the Grail, Kingu makes a desperate escape into the forest. However, the Lahmu discover him there, and so he prepares to meet his fate.

As the Chaos Tide advances toward Uruk, Fujimaru and company form a desperate plan to destroy Tiamat as a last-ditch effort to save the city.

Fujimaru, Mash and the goddesses enjoy one last moment of peace on the eve of the final battle. As morning dawns, Gilgamesh gives some final words of encouragement.

When Tiamat refuses to be defeated, Gorgon makes her appearance. Fujimaru and company return to the ziggurat to join forces with Gilgamesh and prepare for their own battle.

Tiamat falls into the underworld and transforms into Beast II. Hassan-i Sabbah deprives her of her immortality. Seeing their chance, Fujimaru and his companions attack.

The entire group is wounded and battle-weary. As they take stock of the aftermath, they see that Uruk itself is on the verge of collapse. What will the end of their journey bring?