Fate/strange Fake

Clan Calatin finds itself in dire straits after interference from Assassin's Master, Jester Karture. Hansa intervenes, taking up arms not as the Overseer of the Holy Grail War, but as an Executor hunting Dead Apostles. With the Servants dismissed from the stage, the two men clash in a battle fought without Heroic Spirits.

The sun has risen, closing the curtains on the night of the battle at the police station. Orlando, busy with caring for the aftermath of the battle, is visited by Francesca. He fails to conceal his frustration towards Francesca's flippant attitude. Suddenly, a single arrow soars past them, aimed at Gilgamesh and Tiné who are positioned at the Crystal Hill. After intercepting the second arrow fired shortly thereafter, Gilgamesh and Tiné proceed toward the canyon where they discover another Archer waiting for them.

Shortly before the battle in the canyon, in a mansion situated in a swamp, a lone mercenary attempted to summon a Servant. His codename is Sigma. He holds no desires for this world, nor any intention of leaving anything behind. Chosen by the fake Holy Grail for this empty shell of a man was a Servant so singularly unique that it could never be summoned in a normal Holy Grail War...