Yuan Mingyu (played by Lu Yanqi), a modern person, travels back in time and becomes the fourth princess of the Suye Kingdom, a wicked woman who is subject to assassination at any time. Only by becoming an empress can she return to the modern world. Yuan Mingyu, a hot-tempered queen, embarks on the road to becoming an emperor. She teases the innocent guard Ye Shao (played by Kurosawa) beside her and asks him to protect her safety, but unexpectedly, the little guard also has feelings for her. The two work together to break all kinds of prejudices and obstacles. Yuan Mingyu believes that Ye Shao is the person she trusts most in this time and space, but she doesn't know that everything is an illusion. The little guard she trusts most is the prince of the previous dynasty, and he approaches her only to get the fish symbol that symbolizes military power. Between imperial power and love, Yuan Mingyu does not make a choice, she wants it all, and starts the road to strategy.