Prosperity and Romance

The 59-year-old Zhang Huashan is a policeman who is about to retire. When he was on duty again, he was given drugs by a gangster. When he woke up, he became an 18-year-old boy. In order to track down the gangster, he decided to transform into Zhang Huasen and enter Suishan University. Then he encountered a series of incidents and met the heroine Li Manman, who is Zhang Huasen's heart. What will happen to the man behind the scenes?