Bud Gay and Bud Yan travel back in time to the Song Dynasty. They encounter characters from the Chinese classical novel Water Margin and join them in their adventures. The story of Wu Song avenging his brother is parodied in the film, with the Buds playing important roles in affecting how the story unfolds.
Bud Gay is arrested for carrying drugs and sent to prison. When his mother, Mrs Bud Lung, visits him, she realises that a ghost is haunting him, so she sends Bud Yan to help him. They learn that the spirit is a vengeful ghost of a woman, who had followed suit after her husband committed suicide when he was wrongfully imprisoned. All she wants is to see her husband's grave, which is located behind the prison. However, she thinks that she has been fooled when the burial site cannot be found, and unleashes her fury on everyone.
Chow Ka-ho's father runs a big business in Thailand. Lik and his sister May work for the Chows. One day, Chow Ka-ho is overcome by lust and he rapes and kills May. He buries her body secretly and flees back to Hong Kong. Chow's friends—Bud Yan and his cousin Bud Gay, and the Lai brothers—go on a trip to Thailand. They hire Hok as their tour guide and Bud Yan has a one-night stand with her, but she becomes his permanent girlfriend later. One day while playing at the beach, their boat capsizes and Bud Gay almost drowns. He meets the ghost of May in his subconscious state and she gives him a gold chain, with her spirit attached to it. May follows Bud Gay back to Hong Kong and seeks revenge on Chow. Chow is afraid and seeks help from Bud Gay's mother, the expert ghostbuster Mrs Bud Lung. Chow lies that he had killed May unintentionally and feels guilty about it, but the truth is eventually revealed and Chow gets his just deserts.
A hustler tricks a restaurateur into lending him HK$2 million, drugs her, brings her to a deserted beach and kills her. A group of friends doing voluntary work at the beach discover the corpse and report to the police, but the body had disappeared when they come back. The vengeful spirit of the restaurateur possesses the other girls and returns to take her revenge on the hustler.
A boss and his employees go on an excursion to Cheung Chou, an island off the coast of Hong Kong. The stingy boss rents a building for its low rental rate, even though he is aware that people had died from unnatural causes there. He meets a young woman and courts her, despite not knowing anything about her past. Meanwhile, the employees encounter abnormal events while enjoying themselves and they begin to suspect that the woman might be linked to those strange events.
The film consists of three stories. The first is about a girl who calling a radio station for advice and comfort after her boyfriend died in a tragic incident. One of the DJs insensitively suggests that she should commit suicide to join her boyfriend. She heeds his suggestion and the DJ feels guilty when her ghost returns to haunt him. The second story is about a group of friends on a sea voyage who encounter strange events after they rescue a mysterious woman from a boat wreckage. The third story is about another DJ who quits his job after the untimely deaths of his colleagues. He becomes a street racer and stumbles upon a sinister spirit on the road.
The film consists of three loosely connected segments based on the central theme of a mortuary. Mortician Shishedo is grief-stricken when his favourite pop star, Lam Wing-si, is killed in a car accident. Lam's face was badly marred and Shishedo takes her place in the coffin by disguising himself as the deceased singer. He disappears and leaves his colleagues to deal with the ghostly aftermath. In the next segment, Gigi wants a memorial service for her late mother, who had hanged herself. The ghost of Gigi's mother is displeased when the greedy morticians try to trick her daughter into using their services, and she haunts them. The last segment involves a mortician named Hung, who commits suicide after her boyfriend dumps her because of her job. Her boyfriend faces retribution when her ghost returns to haunt him and he dies in an accident later.
This film contains three short stories. The first is about a taxi driver who picks up five different passengers: a gang boss, a fake ghost, a mysterious old woman, an edgy lady and a real ghost. The second story is about a family who moves to a new home, which turns out to be haunted. The phantom is responsible for the family's sudden increase in wealth but also for their uneasiness. The third story is about a night shift security guard who encounters strange events.
Bud Pit and his girlfriend Moon leave the city and move to the countryside for a new life. While moving in, Bud Pit accidentally knocks over a small cremation urn and is disturbed by a spirit for a while. On the other hand, he is attracted to his new, cheerful neighbour Olive. He becomes suspicious of her when he sees her roaming the streets at night, not recognising him and behaving like a completely different person. He seeks help from his mother, Mrs Bud Lung, an expert ghostbuster, who helps them unravel the mystery behind Olive. They learn that Olive is actually possessed by a female ghost who is looking for her lost son. Mrs Bud Lung promises to help the ghost reunite with her (also deceased) son on the condition that she leaves Olive's body after the reunion.