Ho Sau, an undercover agent, has been working with Yau, a drug lord, for years, but his job and family are in trouble.
YUM Investigation is a detective agency that specializes in the supernatural. With their new member Kojiro, the agency investigates a developer who dispatches evil spirits to scare away the residents of an old building. When they discover that the spirits were created by a sinister “spirit refiner”, the investigators must use every trick up their sleeves to crack the case.
Just out of jail, Fai finds a spot on a street corner where other homeless people welcome him. But he doesn’t get much time to settle in. The police soon chase them away, and their possessions disappear into a garbage truck. Young social worker Ms. Ho thinks it’s time to fight this in court. In the meantime, Fai and his friends have other concerns.
The Yau's brothers are a trio of scammers who make punishing baddies their mission. A misunderstanding leads them to fellow con artists the Lui's sisters, and they join hands to scam a notorious mob boss. Through a myriad of ingenious tricks and disguises, they bring the mobster to justice as romance blossoms swiftly—all's well that ends well.
