This is the story of Xiao Yanyan, also known as Xiao Chuo of the Liao dynasty. Xiao Yanyan is the third daughter of prime minister Xiao Siwen and Princess Yan. She falls in love with the young lieutenant Han Derang and the couple eventually decide to marry each other. However, their promise of love is severed when Xiao Siwen agrees to let Yelü Xian take Yanyan as his empress after the latter succeeds the throne. Xiao Yanyan's relationship with sisters Xiao Hunian and Wuguli also deteriorate due to the power struggle between the women's husbands, who each believe they have a legitimate claim to the throne.