
S01E01 Apocrypha: The Great Holy Grail War
Decades have passed since the Greater Grail was taken from Fuyuki. The Mage’s Association asks Kairi Sisigou to take part in the Great Holy Grail War.
Sieg admits that he can't give up his desire to help his brethren, and the Rider of Black gives him his full support. Until Celenike shows up.
There was once a Holy Grail War waged by Mages and Heroic Spirits in a town of Fuyuki. However, one Mage took advantage of the chaos of World War II to steal a Holy Grail. Several decades have passed, and the Yggdmillennia family, who took upon the Holy Grail as its symbol, defected from the Mages' Association. Furious, the Association sent forces to deal with the Yggdmillennia, but were defeated. With the Holy Grail system changed, war at an unprecedented scale breaks out.