Isaac Thoma, the last survivor of a demonic apocalypse, is inexplicably sent back in time to the moment the mysterious [System] began to quantify the world. He now carries the burden of foreknowledge, tasked with preventing the very end he witnessed.

Isaac is a man scarred by a future he desperately wants to erase, driven by a fierce intelligence and a pragmatic will to survive and protect. His past experience makes him ruthless yet deeply committed to humanity's future.

The series unfolds as a relentless, fast-paced struggle against not only demonic hordes and malign deities but also the insidious threat of human greed and shortsightedness. It's a dark, rationalist progression fantasy where one man's strategic mind and future knowledge are pitted against an evolving apocalypse, forcing him to gather a powerful ensemble cast of allies to avert a second, even more devastating, fall.