Xiao Yanyan (played by Tang Yan) is the third daughter of Prime Minister Xiao Siwen (played by Liu Yijun) and Princess Yan. As the youngest child in the family, she is not only loved by her father, but also loved and cared for by her elder sister Xiao Huanian (played by Charmaine Sheh) and second sister Wuguli (played by Lu Shan). Xiao Yanyan, who is loved by everyone, has also developed a character of daring to think, speak and do since childhood. She is full of persistence in pursuing things and never gives up easily. She and Han Derang (played by Dou Xiao) are in love with each other and have decided to spend their lives together. But things are unpredictable. The three sisters of the Xiao family married three branches of the Taizu family respectively. The eldest sister Xiao Huanian married Taiping Wang Yansage (played by Tan Kai), the second sister Wuguli married Yelu Xiyin (played by Ji Chen), and Xiao Yanyan started her legendary life because of an encounter with Liao Jingzong Yelu Xian (played by Jing Chao).