A father and his son are named as the best in Kung Fu. One day, they receive distress signal from the predecessor, then they start their adventure in Hong Kong.

Two inventors encounter a friendly little ghost, and stumble onto a plot to capture the ghost's uncle who was responsible for his untimely death. However, the inventors are warned by a spiritual master that humans and ghosts cannot co-exist in the same room at the same time. Doing so would cause a drainage of humans' life force.

Chu Lai-Ngor and her daughter Vivian have now moved in with Alex Lui. They're not married yet but she's calling herself Mrs. Lui now. Just when the ultimate housewife and ultimate nag Ngor thought she got rid of her competitor for Alex in the first movie, she now has more competition, in the form of choreographer director Joe (Maggie Cheung). Alex's cousin from Canada Ao also present him with a bunch of problems and thoughts in his head with his kids and his perverted attitude. What will Ngor, Alex and Joe do?

Benny Mok and May Lo loved each other deeply as teenagers, but Benny was just a poor kid that May's rich father didn't approve of. So May's father used his wealth and power to separate the two lovers, forcing May to move to Canada.

Li Tzu-Liang is returning to Hong Kong with the ashes of his wife. He now has to bring up his two sons on his own. Though he is quite well-off, he his plagued by debts and when he loses a large sum of money betting on horses, he has to turn to dangerous loan-sharks. Here starts a spiral which gets him and his two sons deeper and deeper into trouble.

To save the Hong Kong Police Force's Banshee Squad from becoming defunct, the struggling new squad members seek the help of former officers Amy (Sandra Ng), now a divorced mom with a young kid, and May (Kara Hui), now partially mentally-unstable, to help them with their training regiment, lead by Madame Yang (Cynthia Khan). Their police skills are put to the test when they are ordered to nab a band of brutal thugs in the city.

Developer Ms. Cheung (Carol 'Do Do' Cheng) yearns for a quieter life in Hong Kong and moves to the countryside, getting herself caught in a showdown between a gang of jewel thieves and two police officers along the way. While Ms. Cheung survives the ordeal, the thieves' injured getaway driver (Siu-Chun To) sneaks into Cheung's moving van and escapes to the countryside, into Cheung's new home. As Cheung settles down into her new environment, she befriends Pak-Lam (Pak Lam Cheng), a skillful and inquisitive little boy who lives in the village. While Pak-Lam helps Cheung tend to her house, he encounters the injured thief. After a brief exchange, Pak-Lam realizes the thief has a harmless and non-aggressive attitude and decides to shelter him in his secret makeshift hideout, not knowing his new friend has in his possession a bag of stolen jewels, in which both the police and the gangsters are searching for.

George Lam is a famous conductor, Maggie Cheung an auto-mechanic; he rides a portable bicycle, she a motorcycle. Somehow, together, they find time to deal with some troublesome teens (Jacky Cheung, Vivian Chow) and fall in love.

Cynthia Rothrock helps to protect a Buddhist boy from villains who wish to stop him from becoming the Prince of the Sun.