The three girls were able to travel together due to company arrangements. They happily arrived at the destination island. No one expected that there would be a series of chilling murders.
Office worker Amy goes berserk and tries to stab her boss, Cheuk, accusing him of sexual harassment and rape. The higher-ups accept Amy's description of the event and Cheuk is suspended, in spite of the fact that in-house lawyer Joe believes the man is innocent. He's right: Amy and scheming department head Jacquline are lovers and conspired to bring about Cheuk's downfall, giving Jacquline a better shot at becoming the new CEO. However, Joe and Jacquline used to be lovers and he knows her scheming and duplicitous nature all too well.
Man has been dumped by his ex-girlfriend Jenny. When he meets Jean he is finally able to forget Jenny, quoting a line about how they met on Valentine's Day and that it fell on the same day in both the Chinese and Western calendars. Their relationship builds wonderfully, until Jean's best friend Joyce comes back into Man's life. Joyce had fallen for Man earlier when he was a senior at university, and still harbors feelings for him. As Joyce starts to hint at how she feels, it begins to cause ripples in Man and Jean's relationship.
Louis Koo plays an assassin who wants to go straight after getting out of prison, so he turns down a job from his former employer Simon Yam to kill a politician. Yam carries out the hit himself and manages to frame Koo for the crime, who then must run from both the cops and criminals as he tries to clear his name.
Three unemployed guys - Lon, Fu, and Pau - go on a trip to Thailand to get their minds off of their troubles. At their hotel they meet a Thai-born Chinese girl, Beauty, who in turn helps them to date three Hong Kong girls who are also in Thailand for the summer. But as the matchmaking for the summer romances commences, true love secretly begins to develop between Lon and Beauty.