In between being a hero and searching for a way to get to Saber, Shirou Emiya got a job as a technician at Chaldeas Security Organization. What is not to like? Very good pay, help save the world, and use his abilities as both a repairman and a magus. It has all the advantages he could want. Too bad his Spiritron Dive ability is too low to be a Master while others fight in Fuyuki.
Shirou Emiya saved Illya and the world. Unfortunately, the price was that he no longer is part of his world. Instead, he has to find a new way and reason to live in a different world. Maybe the inhabitant of that ominous black castle could help...