Lucas, codename Helix, is the combat techno-medic of Mobile Assault and Sabotage Squad Demon. It was their task to gather suitable test subjects for Project Ascension. Located at the remote Station 37-H, it is one of the Holly Terran Empire's most carefully guarded secrets. A task only the Blessed Saint of Hell's Demons can accomplish.

All Lucas is certain of is that something went terribly wrong in what was going to be his and his squad mates' last stand. He was prepared to meet them on the other side. Instead, he finds himself in a familiar place surrounded by faces he has never seen before. His last memory separated by centuries from the present.

However, Lucas is a Demon. It isn't in his nature to be on the defensive. His first priority is to secure Station 37-H and ensure the secrets of Project Ascension remain buried. His second one is to stay alive. His third priority is to figure out what has happened to his comrades because MASS Demon and his entire world have become nothing but spectres in the annals of history. He has become forgotten.