Lin Xiao is a money-grubbing, "lascivious" urban white-collar worker who was tortured by his vampire boss and became a typical "angry youth". Unexpectedly, due to some strange combination of circumstances, he returned to Chang'an during the prosperous Kaiyuan era and met a troubled young master. The eccentric Lin Xiao planned to solve the problem of food and clothing through the noble young master of Tsinghua University and go straight to a well-off life. He lived a life of a mouse in the young master's villa, but the fantasy turned into a fantasy, and the reality was so cruel. . . . Is it so difficult to make a living in the prosperous Tang Dynasty?