Mr. Lo has three sons: Lo Leung (Raymond Wong), Lo Fay (Francis Ng) and Lo Kung (Stephen Chow) and a virtuous daughter-in-law, Eliza. They might seem like an ordinary family, but their relationship needs mending. Lo Leung and Lo Fay play a joke on their brother Lo Kung on his birthday by claiming he has won the lottery, when the truth is otherwise. This sets off a chain reaction of funny mishaps that finally brings the family together.