Hong Kong Customs and Excise Department officers Chow Ching-lai and Cheung Wan-nam share a close mentor-student relationship. On a case involving seized smuggled arms, Ching-lai is sent to take part in a joint operation with Interpol to capture a reclusive arms dealer. However, Wan-nam makes a drastic decision that further complicates the case.
Once famous for his quick blade, a retired assassin can no longer earn a living with his cut-throat skills. Summoned again, he partners with his chauffeur to carry out special missions – fullfilling the wishes of old people looking to kill themselves. When commissioned by a young girl who has been deserted by her parents and lover, the "Elderly's Angel" squad finds an arresting way to complete its task.
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.
