A Bittersweet Life

A Bittersweet Life Hangul RRDalkomhan insaeng lit. The Sweet Life is a 2005 South Korean film written and directed by Kim Jeewoon and starring Lee Byunghun. Ruthlessly violent, it illustrates the ethical codes in the Korean mob and how they clash with personal morality.

Meanwhile, Sunwoo continues to be embroiled in personal business with Baek Daesik over having beaten up several of his henchmen earlier for overstaying their welcome at the hotel. He is then threatened by one of his enforcers to apologize, but he adamantly refuses, fueled by his frustrations over Heesoo. As he relaxes in his apartment later one night, he is suddenly kidnapped by Baeks men to be tortured, but before they can do so they receive new orders via phone call and he is abruptly carried off to Kang, who has returned from overseas and has found out about his attempted coverup of Heesoos affair. Kangs men torture him into confessing why he lied until he is left alone to think about his answer. A daring but messy escape follows, after which Sunwoo plans his revenge.Help from one of Sunwoos loyal men provides him with money and new clothes to go about his plan he secretly delivers Heesoo a gift to make amends and sets up a meeting with some local arms dealers, but as they are affiliated with Kangs organization he ends up killing them over a deal to buy a handgun this incurs a vendetta with the brother of one of the dealers, who promptly sets out to find Sunwoo. He then goes on to set up a veiled rendezvous with Baek Jr. and kills him after a brief conversation, but he is viciously stabbed in the process. Bleeding, his violent shooting spree leads directly to Kang amidst one of his business meetings, where he vents bitterly over how badly he has been treated despite his seven years of service. Kang does not answer, and instead asks if Sunwoos actions were directly because of Heesoo. Sunwoo then shoots him, prompting a shootout with Baek Daesiks henchmen, who had quickly picked up his trail. ........

Source: Wikipedia