Pei Yan, the crown prince of Beijing, appears to be cold, ascetic, and arrogant, but in reality he is a arrogant, terminally ill man with an unforgiving tongue. He found himself a personal bodyguard, Shen Du, a stand-in who looked like his "Dead Bai Yueguang", and planned to keep him by his side as an emotional comfort product.
Shen Du was meek and respectful, he could be beaten or scolded, and he would not hesitate to defend the young master from a knife or a gun. Pei Yan gradually fell from being a "tool man" at the beginning, becoming arrogant but unable to control his care, and all kinds of secret temptations, jealousies, and awkwardness, the readers can see through at a glance that "this attack is over."