The drama tells the story of Xia Zhiwei, Qianlong's daughter, who travels to Beijing to reunite with her father after years apart. When she is at the end of her rope, she meets the female bandit Xiao Yanzi, and the two become sworn sisters. Xiao Yanzi comes up with a plan to get her into the palace, but through a twist of fate, they switch identities. Xiao Yanzi becomes the "Pearl Princess" in the Qing palace and wins Qianlong's favor.
