The heroine got into a car accident while saving a girl. As soon as she opened her eyes, she arrived in a dynasty that was unprecedented in history. She became the substitute of her original sister, married into Prince Xiang's palace on her behalf, and became the little princess of the crippled prince. The story unfolds from there... (Oops~ I'm not very good at writing, please forgive me, the beginning will be a bit bloody, and the plot is also cliche, but it will be better later on, please support me, thank you!)