He had always been able to calmly complete any job his employer gave him. But this time, there had been a slight accident.
—His employer seemed to have screwed up.
And after screwing up, they started looking for outside help.
The job that had caused his employer to screw up was called the "Holy Grail War."
A war game where Heroic Spirits from history were summoned to fight one another.
"Just save me first! Retreat quickly and summon a Heroic Spirit!"
That was what they had said.
Sigma had always felt that his employer tended to be rather casual. If something was within their capabilities, then even if they called him over, they would probably just let him handle it however he saw fit.
But this time, they seemed just a tiny bit anxious.
So Sigma had no choice but to board a plane.
Yet only after getting on the plane did he realize he might have acted rashly.
There were magi on the plane.
And not just one or two.
Magi would never travel together.
Much less a whole group of magi boarding the same flight.
The situation was obvious, then—these people were probably all heading to Fuyuki to take part in the Holy Grail War.
Though he had not had much time, Sigma had heard a few things before coming.
—Athena's Olive Branch.
Someone had discovered it in Greece.
It was said to be an inconspicuous olive branch that had been buried beneath collapsed stone slabs.
An exceedingly rare Holy Relic that had been sealed away for over two thousand years.
Though the Holy Grail War could not summon gods, it would surely be able to summon something extremely close to one.
If one could summon a great hero like Heracles, victory would practically be guaranteed.
"Should I