Cui Huang, a young princess, had just turned 19. Even though she is young, everyone is putting pressure other. Her father Jie Huaing, king of China, is in a fight with the Korean king and that will lead to war. But, since Jie is sick, everything will be even harder. If he dies, Tao, Cui, Krystal and Jessica will be in a big problem. Cause only one of them will be the heritor and they are all siblings. Welcome to a difficult life of a princess.