Dog bites dog (Cantonese version)

Peng, who comes from Cambodia, was sent to a black market boxing gym to fight for a living since he was a child. He has a fighting personality and is as cruel as a beast; Wei, a detective from the crime team who was born in Hong Kong, acts extreme and does not listen to orders. When he invests in investigating cases, he is as brutal as a wild eee. A soldier and a thief go to extremes, but they meet because of a murder case involving a judge's wife. The two pursue each other and compete with each other, and they are more violent than others. Wei's colleagues are killed by Peng one by one. Wei's anger and resentment boils to the boiling point, and the dog-eat-dog fight gets out of hand.