Lin Guoquan (played by Simon Yam), the captain of the fleet of Hong Kong Kowloon City Police Department, is a conscientious and unspectacular uncle. However, whenever he encounters an emergency on the streets, Brother Quan will show off his skills and defeat the vicious villains. It turns out that Brother Quan used to be an excellent police officer in the Criminal Investigation Division, but in order to take care of the mentally retarded...