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.

Despite harboring doubts about her unusual summoning, Ruler heads to the battleground in Trifas, Romania, to preside over the Great Holy Grail War.

A young homunculus boy tries to escape after waking up inside a tank. Just as his strength gives out, Rider of Black appears.

Berserker of Red approaches the Black Faction stronghold. The Yggdmillennia clan and their Servants seize the opportunity to take action.

Saber of Black vanishes after giving his heart to the young homunculus boy. Ruler swears to do everything in her power to grant him his freedom.

Believing a Servant could be behind the string of gruesome murders terrorizing Romania, the Mage's Association sends in Kairi to investigate.

Fiore battles Sisigou after traveling to Sighișoara in pursuit of Assassin of Black. In the face of danger, a familiar figure rushes to her side.

The Great Holy Grail War enters a new phase as the Black and Red factions engage in an all-out conflict. Ruler and Sieg both head to the battlefield.

With the battles raging on, the Rider of Red learns who the Archer of Black is, forcing him to take on his former master.

Sieg stands up to fight a formidable foe and protect his savior, the Rider of Black. Though weak, he's soon joined by a hell-bent Berserker of Black.

The battle between the Lancers of Red and Black heats up, yet they remain gridlocked. Watching, Darnic hatches a plan to get what he wants.

Ruler and the Black Faction rush into the Sky Garden in chase of the Red Faction, who are now in possession of the Greater Grail.