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.

Shawn Yue and Miriam Yeung reprise their popular roles as a star-crossed couple who strive to stay together happily ever after, only to find their already precarious relationship further strained, when Jimmy’s childhood friend asks him to donate sperm, and Cherie is troubled by the re-marriage of her father.