A financial analyst and manager died from a heart attack. But he found himself reincarnated in an alternate world where technology had surpassed his original world's version of the early 20th Century. He found himself living peacefully together with his new family when a bomb is dropped on his beloved home.

And as the world revolved around a cycle of chaos, all the nations released their best agents to spy on their enemies in an effort to get the upper hand in this new world's pecking order.

This is the story of the man who will be known as the greatest spy in this new world.