Bong pays a visit to Cheung Chau with four old friends. Yeung Tin-moon, one of the four old gentlemen, behaves very unusual when playing mahjong. He admits that he is diagnosed with dementia. After the game, they leave. They encounter a greedy child called Piggy. Bong buys up all the merchandises that Piggy sells. In a trade negotiation, Leung and Ling need to deal with a dame. They have to walk her dog. Accidentally, the dog goes missing. Ling suggests buying a dog that looks alike. Soon after they have bought a new dog, they find the missing one. Leung ends up taking care of the replacement dog. In a food poisoning accident, the old folks are sent to the hospital. The doctor in charge is Piggy’s mother. Ronald Tse Man-lok is the new CEO who take up office. Hin tries to butter up Ronald, yet unsuccessful. Ronald treats Trustworthy as the strongest rival. Hin encounters Ling one day……