A mad scientist wants to get his hands on a certain growth-accelerating serum developed by Hong Kong scientist Dr. Li Zong-Hua so that he can create an army of supermen and conquer the world.

Li Ying-wei returns to Hong Kong from England after his grandfather falls ill and is expected to take charge of the family business. Free-spirited and fashionable, Ying-wei quickly clashes with conservative traditions and becomes the target of scheming relatives eager to seize control of the company. Escaping the pressure, he secretly joins a pop band traveling to Japan, where music, romance, and danger await. As gangsters threaten a hotel owner and conspiracies close in from Hong Kong, Ying-wei must use both his charm and martial arts skills to protect those around him and uncover the truth.