At fourteen, Ruan Qingzhu sells herself into the wealthy Jiang household for a few good meals, fully intending to run away. Her extraordinary martial arts soon make her the senior maid and bodyguard of the Jiang family’s spirited eldest young lady, Wanying. When an imperial marriage decree and a northern war threaten Wanying’s future with General Li, Qingzhu must choose between the freedom she once prized and the family she has found.