Legend tells of a land split by the Luo river, with the farming kingdom of Wei to the south and the nomadic kingdom of Jing to the north. Agula, a princess of Jing, has lived as a prince since birth so that her devoted parents could remain together. Orphaned by war, she hides for ten years and sharpens her skills, planning to slip into Wei as a flattering official and sow chaos. Nangong Jingnu, a princess of Wei, should have enjoyed an easy life, but the power struggles at court push her to follow in her father's steps. A chain of events at the Qionglin banquet ends with Agula named as Nangong Jingnu's husband. Adapted from a JJWXC novel, this ONA blends romance, drama, mystery and psychological intrigue.