The female protagonist is an ace spy sent by an enemy country. Her mission is to get close to and defraud the male protagonist (the iron-blooded general of this dynasty) into trusting and military secrets. However, during their three-year relationship, she faked the show and fell deeply in love with the male protagonist. After the male protagonist discovered her identity, he deemed her a traitor and threw her into prison. The female protagonist died in torture and despair, and only then did the male protagonist understand the truth from the encrypted relics she left behind that she had never betrayed her - she had long ago passed on the enemy's intelligence in reverse, and had secretly protected him countless times. The male protagonist collapsed, but unexpectedly learned that the female protagonist was reborn before they first met. This time, it was up to him to spend the rest of his life looking for her, loving her, and atone for his sins.
