Youyou, a veterinary student, is dumped by her boyfriend because he thinks her major is embarrassing. In her grief, she accidentally falls into a tiger enclosure and wakes as Liu Jieyou, a convict servant in the Han dynasty’s palace. Her father is dead, her mother is gone, and her little brother An'an is about to be taken away and castrated. In this desperate situation, her cousin Xijun, also a convict servant, volunteers to marry a princess off to Wusun in order to save An'an, asking Princess Hao to pardon Jieyou and An'an and let them leave the palace. Xijun tricks Jieyou into agreeing to the political marriage, claiming she only wants to pursue freedom, but dies of illness three years later after failing to adjust to the climate. To protect her little brother, Jieyou accepts the marriage edict, bids farewell to her first love in Chang'an, and sets off across the desert for distant Wusun. Along the way, her modern animal husbandry knowledge helps her treat sick horses and find hope amid a sandstorm, earning the admiration of Wusun’s aloof heir, Weng Guimi. At the royal court, she becomes a political pawn, married to Kunmi Junsumi, who wavers between the Han and the Xiongnu, while also having to deal with the beautiful Lady Zuo sent by the Xiongnu. Ministers who favor the Xiongnu see her as a thorn in their side and make trouble for her at every turn. Lady Zuo, Atilla, dies in childbirth, and Junsumi falls gravely ill from grief. The Xiongnu seize the opportunity to bring their forces to the city walls, while rumors push Jieyou and Weng Guimi to the brink. On his deathbed, Junsumi entrusts the throne and his heir to them, then orders Weng Guimi to marry her according to Wusun custom... When the spring breeze sweeps across the grasslands of the Western Regions, can she become a legend who brings peace between the Han and Wusun?
