The Killer

After the death of his beloved, Killer O (Takashi Sorimachi) completely sealed himself in a safe and secluded residence. Only killing and loneliness were left in the dictionary of life. However, when Chin, an innocent girl who resembled his ex-girlfriend who was hired to clean the residence, appeared, the door to his heart was opened again. However, the two had never met. Tok (Andy Lau), who likes the thrill of killing and aspires to become the number one professional killer, forces O to show up, intending to expose O's true identity to Chin. Experienced Interpol Lee (Simon Yam) has been tracking O for more than 5 years. Under the double attack of Tok and Lee, O was forced to ask his superior C7 for help. What O doesn't know is that C7 and Tok are the sharpshooter brothers who disappeared after the Olympics revealed by Lee. He will be rescued this time because Tok puts pressure on C7. However, Tok's purpose is to have a life-or-death duel with him.