Carlos Chan Ka-Lok

When Hong Kong is rocked by multiple gruesome murders, the police forms a task force to investigate.

A debt collector receives a call from a woman who is kidnapped by an unknown gang. He thinks it is a joke but soon, he realises that it is not a prank.

Cheung Sung-bong is a highly respected cop with a long history of success in dangerous cases. However, his past soon comes back to haunt him when a former protégé resurfaces, seeking revenge.