Sergeant Tong is wracked with guilt after he unwittingly kills a young girl whilst capuring a criminal named Cheung. When the girl's sister is later kidnapped in a ploy to get Cheung released, Sergeant Tong vows to find and rescue her before she comes to harm.
A criminal, a bank clerk and a police officer find their destinies entwined when a loan shark gets assaulted after having withdrawn $10 million from the bank in the midst of the world financial crisis.
A vigilante serial killer in Hong Kong leaves ominous death notices, prompting the police to launch a special task force to uncover a hidden conspiracy.
Ho Sau, an undercover agent, has been working with Yau, a drug lord, for years, but his job and family are in trouble.