Since birth, Xiu has been diagnosed by doctors as suffering from a rare disease that will prevent him from becoming an adult for life.
So he spent every day in the hospital, reading books. However, his condition worsened and he eventually died.
When he woke up, he found that he had turned back into a baby and realized that he had become Cao Ang, the son of Cao Cao.
By reading books, he learned that he would die in the Battle of Wancheng. In order to avoid such a future, he decided to use the knowledge of his past life to survive.
This story is adapted from "The Romance of the Three Kingdoms".