The Dayong Dynasty fell apart, wars were everywhere, and the chaos was like ink, swallowing up countless people. Shen Xun's parents were killed when she was young, and she grew up crawling around in the mire of the bottom. She has seen the most secret malice in people's hearts - they are hidden in the pursuit of people in the middle of the night, and in the hypocrisy of the day, but they have never worn away the tenacity and edge in her eyes. In order to find out the truth about her parents' death that year, and to find a stable place to stand, she targeted Jing Heng, a powerful minister who had great power but was in a delicate situation.
Jing Yan is cold and deep, holding a network of secret agents and military power. On the surface, he assists the young emperor, but in fact, he works step by step among the various forces and plans his own chess game. He saw through Shen Xun's deliberateness and calculation when he approached, but he still took her under his wing and regarded her as a sharp blade that could be used, letting her sneak into the enemy camp to deliver news and act as a pawn in the secret fight in the court.
The two are allied with interests, and deal with each other's temptations and calculations: she uses his power to uncover the enemy in the dark, and he uses her agility to resolve fatal crises; late-night plots hide unfinished temptations, and the helping hand under the light of the sword is mixed with selfish selfishness. When the hidden malice gradually surfaced, involving a conspiracy that could overthrow the dynasty, the two allies with different thoughts were shocked to realize that in the game of going to dangerous situations together, the calculation had quietly cracked, and the light in each other's eyes turned out to be the salvation that each other wanted to seize most in the darkness of troubled times.
