One is an emperor who left the throne to seek the beautiful scenery of the south of the Yangtze River, and the other is an upright young man whose family is in trouble and wants to pray for the people.
The young man grew up to be a wise prime minister. He was somewhat helped by this unknown former emperor, but more importantly, he was accompanied by him. The world of officialdom is filthy, and he is the only one who can accompany the young man to keep his pure soul and never abandon him.