A highly trained and exceptionally deadly swordsman looks for revenge after being caught in the middle of a power struggle that results in the assassination of an innocent woman's family.

After villager Gu Dahe reports criminal leader Wei Tianlang, he mysteriously disappears, and his sister dies under suspicious circumstances. Amid a nationwide anti-crime campaign, Lei Yang, captain of the criminal investigation unit, steps in to uncover the truth and bring justice.

Local constable Xue Buyi keeps his distance from corrupt colleagues until he is framed for the theft of thousands of dollars in relief funds. Now he must choose: fight to clear his name or uphold the law he's sworn to obey.