改编自TYPE-MOON发行的同名手机游戏:描述在公元2015年,一个魔术尚存的最后时代之中。人理继续保障机关「Chaldea」,透过近未来观测镜「Sheba」突然发现人类即将在接下来的2016年中毁灭。为了针对异象及时空特异典进行解析及干涉,他们利用被统称为「Grand Order」的禁忌仪式,将术师灵子化之后送回过去,只为阻止人类历史就此中断。It is the year 2015, the final era over which magic still held sway. Caldea is an organization established to observe the magical world and the world of science - as well as to prevent the final extinction of mankind. Humanity is guaranteed at least another 100 years, that is until the future realm observed by Caldea vanishes into thin air. Caldea is now sure humanity won't live past 2017, all thinks to events taking place in the Japanese city of Fuyuki in 2004. The organization issues a Grand Order for a "Holy Grail Expedition" to investigate, uncover, and perhaps destroy the singularity responsible for wiping out mankind.