King Grey is one of the oldest, wealthiest, and most powerful monarchs in a world run by martial skill. However, those with great power remain close behind those with isolation. Beneath the glamorous exterior of a strong king, there lies the shell of a man – unfulfilled. Since reincarnating into a new planet, the king has the ability to relive his former existence. Unfortunately, correcting the errors of his past would not be his only obstacle, nevertheless. Beneath the current stability and prosperity of the modern century, an undertow of uncertainty threatens to kill all he has worked for.