The story of The Gangster, the Cop, the Devil is a high-octane Korean action thriller that follows an unlikely alliance between a powerful underworld boss and a headstrong police officer to catch a sadistic serial killer. The Unlikely Alliance Jang Dong-soo
As of now, the legal availability of the Hindi dubbed version varies by region. Here are your best bets:
The two men, who represent opposite sides of the law, strike a tense bargain: provides the police's forensic data and surveillance. The Gangster
For a quick breakdown of the plot in Hindi, YouTube offers several movie explanation videos.