This is an imaginary but possibly real story. In the distant Western Zhou Dynasty, there was a country called Dan, which was bordered by Qin to the west and Zhou Dynasty to the east. It was connected to Nanchu in the lower part and Beihu in the upper part. It could be regarded as a country of ten thousand chariots. Its king, Dan Henggong, was also virtuous and loving to the people~! His beloved concubine Shanyuan was also there for him. She gave birth to a clever boy, but unfortunately, Empress Shanyuan died after giving birth to a boy. She died on the delivery bed, but not from dystocia, but was stabbed to death by her lover's sword. When she was stabbed to death, there was a living little life in Empress Hou's belly. He was supposed to be the second prince, but now he was born. He was abandoned in the wilderness of Nanjun together with his mother. When he rushed over, the firstborn son was already a handsome young man. Unfortunately, he was mentally ill and had to be cured with human blood. Only the blood of his own brother could cure Yu. This made Duke Heng very anxious, because he knew that the prince's biological brother had been stillborn a long time ago. How could it be so? The child in the womb of a dead person can grow. With a glimmer of hope, he sent people to Nan County to find someone who looked just like Mr. Yu. Sure enough, there really was a man who looked exactly like Mr. Yu! Is this really the second prince? Will he risk his life to save his brother? Will he abandon his second son again? Will he watch his brother die?