After traveling through time and becoming the most noble eldest princess in Daliang, Shen Zhaoyi originally thought she was getting a script of "power and peace of mind". Good news: On the wedding night, the proton consort sent by the enemy country is as gentle as jade and looks easy to handle. Bad news: The moment she lifted the hijab, she discovered that this man's eyes were as sharp as an eagle, and he was not the obedient proton at all! This person is a fake, and a time bomb that could detonate the court at any time. In order to preserve the shaky peace between the two countries, and to prevent herself from sitting in the position of the eldest princess with fear, Shen Zhaoyi chose: make mistakes and act! During the day, she is a dignified and virtuous eldest princess, and at night, she is an "undercover partner" who battles wits and courage with the prince-in-law. However, as time passed, she realized something was wrong. How could Xi Zuo, who had agreed to be an enemy country, help her fight off the powerful ministers in the court? He promised to overthrow the dynasty, but why did he quietly help her repair the leaky palace in private? Even under the candlelight late at night, the way he looked at her was so gentle that he seemed to drown her. "Your Highness, if the world is in chaos, I will protect you." Shen Zhaoyi's heart skipped a beat: Why did the promised villain start to take the affectionate route? Don't think that I don't know about the treason list hidden in your study! There is no system, no foreknowledge, just two people with their own hidden agendas, acting out in the turbulent court, and they become a real couple.