Chaldea agents Ritsuka Fujimnaru and Mash Kyrielight travel to Babylon and encounter the heroes and gods of that realm.

Following the success in the Camelot Singularity, Ritsuka Fujimaru and Mash Kyrielight are assigned to the last Singularity. In Ancient Mesopotamia, B.C. 2655, they embark on a mission to secure humanity's survival. Upon arrival, they learn about the three Goddesses that threaten Uruk, the Babylonian city ruled by King Gilgamesh. Ritsuka and Mash will now need to find a way to severe the alliance between the three Goddesses and stop the blood-thirsty beasts that threaten the future of the humanity.—Scientiiaa