When a criminal escapes justice managing to slip through a loophole found by his defence lawyer, with so much ease, the defence lawyer manages to rip apart the police while questioning them. Disheartened and maybe getting too old for the job Police Officer Fok Chi-Ho (Donnie Yen) sets himself a new goal to balance the scales for justice. Spending seven years studying, he becomes a Prosecutor for the DOJ Department of Justice. With his newly appointed position Fok dives deep into this first case he is given by his boss Yeung (Francis Ng) spending time with seasoned lawyer Bao Ding (Kent Cheng) who has been assigned with Fok to show him the rights and wrongs of being a prosecutor. Fok takes on a supposedly simple drug trafficking case. The case should be straight forward, a poor man Ma Ka Kit (Mason Fung) has been charged with drug trafficking, with his defence advising him to plead guilty for a lesser sentence. Fok is not convinced that his defence are doing the right thing by their client, this prompts him to dig deeper into the case, and investigate all directly involved with this case.