The Imperial Astronomical Bureau predicts that if the Emperor of Dayin has a daughter before turning thirty, she will be the lucky star of the entire Dayin Empire! Emperor Xiao has long yearned for a daughter. After adopting Xie Mingzhu, the orphaned daughter of a loyal general, he makes her Princess Funing. Not long afterward, his legitimate daughter, Xiao Cheng'an, is born amid heavenly auspicious signs and is bestowed the title of Grand Princess Zhaoning. She is showered with boundless affection by her father and nine imperial brothers. Jealous of the love and honor Cheng'an receives, Xie Mingzhu attempts to compete for favor, but ultimately brings disaster upon herself. All her crimes are exposed, and she receives the punishment she deserves. Meanwhile, Princess Zhaoning, Xiao Cheng'an, grows up safe and happy under the loving protection of her family.