The Substitute Princess Went Crazy and the General Begged for Reconciliation.

The general wields power over the government and the public, but he imprisons the enemy's princess in his mansion as a substitute for his deceased wife. She cooperated obediently and acted with him because she was charged with the mission of overthrowing the dynasty. Until the night of the palace coup, she held a long sword against his throat: "Your Highness, it's time for your late wife's grave to be moved." Only then did he realize that he had never really seen through this "substitute".