The profit-oriented middle-aged businessman Chen Bi Da exchanges memories with high school student Gao Wen Ming after an accident and became a second year student at Yuying Middle School. Even more surprisingly, he finds out he has a son, Jiang Yu, he has never met before, who by accident becomes his deskmate.

Chen Bi Da uses his business experience to deal with Jiang Yu, but soon realizes that adult rules do not work at all in a group of middle school students, causing all kinds of ridiculous incidents. More troubles arise when Chen Bi Da's company starts facing dangers and the real Gao Wen Ming wakes up in Chen Bi Da's body...