Professor Kiu is a mad scientist who developed mental disorders from grieving the death of his son. Kiu orders his assistants to kidnap men to his lab, located in a private container on a vessel, for experiments. Police inspector Uncle Wah had sent his subordinates to gather evidence in the vessel, but failed to find any. Shek La-mai, an acrobatic performer and a former commander of the Special Duties Unit is a single father of three children. One night during a performance with his protege, Lam Hong, witnessed and intervened in a kidnapping incident by Kiu's henchmen, and the two became targets of Kiu. On the other hand, Uncle Wah discovers Shek's resemblance to a Japanese scientist named Toyota, who colluded with Kiu. Wah formulates a plan for Shek to act undercover as Toyota in order to gather evidence from Kiu's lab.
as Shek Lai Ming
as Professor
as Shek Lai Chi
as Shek Fei Hung
as Helen
as Lim
as Uncle Wah
