One day, Yeon Woo-hyeok falls into the martial world and becomes a civil servant. He is a seasoned player of the martial arts detective game, Great Hwan-Guk's Famous Bodyguard. Without any warning, he finds himself reincarnated as the bodyguard from the game. Fortunately, he realizes that the game's events are unfolding exactly as he had memorized them. As he begins solving cases, he starts adapting to his new life as the bodyguard. But his joy is short-lived when he discovers his ability, "Yeongan," is actually the opening of his dantian. Because of this, he faces the imminent danger of dying young. Wait, even just being a bodyguard is tough, but now he must learn martial arts and become a powerful master?! (Source: Kakao Entertainment, translated)