What is this about??

[deleted]

*Spoiler*


A Hitman is ordered to go after the men who kidnapped his boss's son. The boss sends out red envelopes after he gets information to each kidnapper. Arthur is the man who receives the envelopes than calls the hitman to do each job. The Hitman later kills a few men, one of which turns out to be the boss's son. The men who kidnapped them were friends or colleagues of the hitman. They were working for Italians that were looking for Tatat which turns out to be three suitcases, one being yellow. Since the hitman was involved he knows he's going to be a target later. At the end he replies to a friend of this who he has been playing chess through notes in a gold envelope. He is the captain of the police. He asks the hitman who is the hardest and easiest person a hitman can kill;basically. At the end I believe the hitman checkmates the captain and answers the riddle. The answer was himself, than he takes his own life.

I've been searching for Broken Orange sung by Pakk Hui, which is the theme song.