A large family decide that they must find a bigger place because their current flat is too cramped and triads are threatening to burn them down to pass a message on to somebody down the corridor. So after being mucked around by an agent selling a house in the country, they move into a dilapidated house. They then discover that it is going to be torn down and a huge shopping centre erected.

The Biu Family collects their lottery winnings in Canada and returns to Hong Kong to start a new life together, minus the second daughter due to a family quarrel of her involvement with her boyfriend. After Mrs. Biu shows off her money to her old friends at her bank, she loses it all in a robbery. Now, void of their new found wealth, the Biu Family must start over from scratch again.

Upon returning home, sailor Yu (Richard Ng) is shock to discover that not only his wife left him, but the house has also been sub-letted to an old maid, May Wong (Josephine Siu). Both Yu and Wong have their own strange habits, and them living together under the same roof causes numerous hilarious incidents.