Tenn Kong-Hui is a private detective who uses people’s shady pasts to blackmail them. Tai-Giok is a secretary to a steel company’s chairman, and a dangerous character. When she and Kong-Hui break up, he begins collecting evidence against her, and in the process unearths the dirty secrets of the people associated with her.
One day, Kong-Hui is found dead in his apartment. There are five suspects but all of them have alibis. Just when the police seem to have hit a dead end, a sixth suspect emerges….