Mu Bai sent Dai Shuang to the prison to deliver poisoned wine to Prime Minister Wang. Prime Minister Wang knew that he would definitely die, so he took all the evidence in front of the emperor and helped Mu Bai be blamed.
Prime Minister Wang wrote a letter to Mu Bai before the emergency, revealing his true identity as Mu Bai's biological father.Dai Shuang returned to Mu Bai with a letter from Prime Minister Wang. After reading the letter, Mu Bai checked the information and confirmed that his true identity was not of royal blood.