Fate/Annihilation

After the detection of Singularity F by the Chaldea Security Organization using the Sheba lense, the 48 Master candidates were prepared to Rayshift to the anomaly beginning with A Team. During the Rayshift process, the Coffins malfunctioned, rendering A Team incapacitated and resulting in the need to place them in stasis until they could be thawed and woken. B Team was thus promoted to the frontline and successfully were Rayshifted into Fuyuki City's Singularity.

Returning successful from the mission, the seven Masters of B Team were appointed the task of repairing the seven larger Singularities that had manifested and threatened not only to erase humanity and its known history, but threatened to become much greater threats known as Lostbelts. Each of the seven Masters were assigned a Singularity and Rayshifted to each individually in the hopes of correcting the Singularities all at the same time. However, one by one, the Masters succumbed to their Singularities. No longer having anything in their way, the Singularities continued to worsen, with none of the other Masters capable of correcting them. Within a week, the bodies of the B Team members vanished and Chaldea came under attack.

With only Ritsuka Fujimaru, Leonardo da Vinci, Doctor Romani Archaman, Mash Kyrielight, and a small crew of staff left alive after escaping, the search began for a cause. Some being had revived the seven fallen Masters, who proceeded to take control of the newly-formed Lostbelts, turning the Earth into a blank slate. As the final remaining Master, Ritsuka Fujimaru was tasked with one mission - defeat the former B Team members and destroy the Lostbelts.