Princess Situ Jing of the former dynasty was adopted by General Situ Qingyun and his wife, and was much favored. Situ Jing is a lively, cheerful and intelligent woman. She loves the free world outside, often dressed as a man, wandering in the city alleys, plus she to the Dragon Warrior self-proclaimed, I do what I want, the sky is the limit, but also like to play pranks, so the friends of the three religions and nine streams to send her affectionate nickname "crayfish". Situ Jing in a coincidence of chance to meet the great wisdom of the emperor Zhu Yun and a good-looking and suave Bai Yunfei, and the three people worship as brothers, the story of the three people from then on.