A Taiwanese language film. After the death of their mother, Siok-hui sings in a nightclub to support her younger sister Siok-tshing, but her immature sister looks down on her occupation. Siok-tshing then begins working in a pharmaceutical company where she has a crush on her colleague Bun-pin. But little does she know that Bun-pin has fallen passionately in love with her sister. When she finally discovers the truth, she runs away and drowns her sorrows at a bar. There, a lascivious businessman who stalks her sister forces here to go with him to a hotel. Siok-hui rushes to the hotel, where she finds the man lying in a pool of blood...

Tenn Kong-Hui is a private eye. Kong-Hui’s ex-lover, Tai-Giok is a personal assistant to a steel company’s chairman. By spying on Tai-Giok, KongHui discovers many dirty secrets of the people who work at the steel company and decides to blackmail each one of them. When Kong-Hui is found dead in his apartment one day, the police detective has identified five suspects. However, as the detective digs further into their stories, he finds that all of them have alibis. Just when the investigation seems to hit a dead end, a sixth suspect suddenly emerges…