Zhou Huangyin, the empress of the Great Zhou Dynasty, used thunderous means to end the troubled times and establish a new dynasty. In order to completely appease the people of the old Xia and disintegrate the remaining forces, she accepted the most risky proposal: to make the former Xia emperor Xie Zhiyao her queen and imprison him in the deep palace.
On their wedding night, she made a three-year agreement with him: for three years, after helping her stabilize her family, she would allow him to be free. She thought he was an exquisite prisoner and a pawn in a political marriage. But every time she encountered a stalemate in the court, he used seemingly absurd "tricks" to break the situation for her - a bet to conquer the frontier generals, and a lecture to inspire her to open up the Western Regions. During the day, they are kings and ministers; at night, they are a couple testing each other's boundaries and tugging at each other's passions.
However, when Zhou Huangyin discovered that Xie Zhiyao's "subjugation" was actually his own initiative, intending to use her to eliminate the world's chronic diseases, trust completely collapsed. Deeper secrets emerge: the life experience of Zhou Yu, the nephew whom Zhou Huangyin regards as his own son, is inextricably linked to Xie Zhiyao; and the Queen Mother Zhou and General Xiao Hanshan, who have always been hostile to Xie Zhiyao, also seem to have hidden past events.
In the process of dealing with internal strife and external threats, the two souls who are best at calculations have given their sincerity to each other in life and death time and time again. In the end, facing the mastermind who was trying to subvert everything, Zhou Huangyin and Xie Zhiyao teamed up to set up a shocking chess game. She gave up monopolizing the country for him, and he surrendered all his loyalty to her. On the day when the world was reunited, she pointed to the map of thousands of miles that he had presented and said proudly: "I want to share this country with you."
