The Gangster, the Cop, the Devil

After a man's car is hit by a stranger, the stranger kills him as he takes pictures of the damage to submit to his car insurance. Jung Tae-suk is a cop who goes through the crime scene and suspects it to be the work of a serial killer, but his commanding officer does not believe him. Jang Dong-soo is a crime boss who, while on his way home after a meeting, is hit by the same killer, who tries to kill him as well. A brutal fight ensues, leaving both of them injured. Finally, the killer escapes after hitting Dong-soo with his car. Dong-soo is admitted to the hospital, and his henchmen assume that the attack was committed by a rival gang, whom they counter-attack.