Shortly after astrology predicts destruction to befall the Tang Dynasty, a coup d'état led by the crown prince Li's very own brother kills him and his wife and sons. Li's daughter, princess Yongning, manages to escape, but is soon declared dead alongside her family. Full of wrath, the princess swears to avenge them as she takes on the identity of a young man, Li Chang Ge, and moves to the Shou province to advance her...