Li Shimin, who has been ambitious since childhood, met his eldest grandson Wuji, whose parents died and went to live with his uncle. The two grew up together and had a mutual affection for each other. Nai Na felt that it was shocking but didn't want to hurt his younger sister Changsun Wuwen, so he kept deliberately avoiding it while busy. But once feelings arise, they cannot be ignored as time goes by. The two have experienced countless wars and conspiracies together, and their true feelings are revealed. After the Xuanwu Gate Incident, the two became more and more unable to control their relationship, and finally decided to stay together for the rest of their lives. The long story of a generation of emperors and wise ministers unfolds in the wind and waves...