One day, Yeon Woohyuk falls into the world of Murim and becomes a government official within it.

He was once a veteran player of the martial arts detective game "The Great Detective of Daehwan Empire." Then suddenly, without warning, he finds himself reincarnated as a pokoe (detective officer) inside the game.

Fortunately, he realizes that the cases from the game unfold exactly as he remembered, so he begins to adapt by solving them.

But the joy is short-lived—he discovers that his ability known as "Spirit Eye" is actually the result of his dantian (energy core) being forcibly opened, putting him at risk of an early death.

Being a detective is hard enough— and now he has to learn martial arts and become a powerful master too?!