A group of college kids discovers the remains of an evil warlord from an old cave and brings it to their dormitory, which ultimately awakens the warlord's ghost. It is seeking to avenge his killer, who has since reincarnated as Mr. Hong's snobby girlfriend Annie. With Hong and Annie endangered, Hong's reincarnated spirit takes over to save him and Annie, and defeat the demon.

Happy Ghost IV

Sammo Hung plays three different characters: Fatty, Fatty's father and Fatty's grandfather, Hung Kau. Fatty is a hotel worker, yearning for sudden wealth. Therefore, he, and his co-worker, enter the gambling world, to the dismay of his father. When Fatty hits rock bottom, the ghost of his grandfather resurrects to help him. However, Fatty learns that his grandfather was murdered, therefore, he will stop at nothing to avenge his death.

The Gambling Ghost

Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.