Fate: Perfect Salvation

"Uh, I'm... an Executor chosen by the Counter Force?" asked a kidnapped boy from Earth in a timid voice.

The two little blond- and silver-haired girls before him, named Alaya and Gaia, nodded in unison, their eyes filled with malice.

"I'm supposed to carry out... a mission in the FATE world?!" The boy's face turned pale, and his future suddenly looked bleak.

In the dark era known as the Fourth and Fifth Holy Grail Wars, where Master fatalities reached 70% and Servant fatalities reached 80%, what changes will follow the arrival of the so-called Executor of the Counter Force? When the Holy Grail descends, will it unleash the evil that has built up within it, or long-buried hope?

(Report: Danger ahead! Five wild Saberfaces spotted. Requesting further instructions...)