In order to solve the problem of Golden Hoi Star Hotel, YAT-SHING says that the hotel needs to simplify the structure by firing some unnecessary staff. CHEUK-SZE writes a resignation letter but SHING-CHIT tears it and he asks her to go travelling together. TSUI-YEE begs HO-YAN to hire her as a private detective and HO-YAN finally agrees to assign jobs to her. As requested by YAT-SHING, SHING-CHIT and CHEUK-SZE go to Vietnam to investigate the business of Golden Hoi Star Hotel. In order to keep it as a secret, they pretend to be husband and wife. YAT-SHING goes to the legal department of the hotel to ask for legal advice and he is shocked to discover that the lawyer is YUEN KIU. YAT-SHING visits CHI-CHUNG at YUEN KIU's place but CHI-CHUNG only talks to HO-YAN. YAT-SHING invites TSUI-YEE to help investigating the tour group in Vietnam secretly. CHUI-YEE sees SHING-CHIT and CHEUK-SZE coincidentally……