The Gangster, The Cop, The Devil -

After a high-speed chase through a crowded district, Dong-soo captures K just seconds before the police arrive. He takes the killer to a secluded warehouse to torture him. Just as Dong-soo prepares the killing blow, Tae-suk crashes his car into the warehouse. He knocks out the mob boss and arrests K, choosing the law over vengeance. The Resolution 💡

Jung Tae-suk is a hot-headed detective convinced that a string of recent "accidental" murders are the work of a single serial killer. His superiors ignore him, but he realizes Dong-soo is the only living witness to the murderer. The two men strike a deal: The Gangster, The Cop, The Devil

Dong-soo provides the manpower and underworld intel. Intel: Tae-suk provides police data and forensic tools. After a high-speed chase through a crowded district,

Whoever catches K first gets to deal with him their way. The cop wants an arrest; the gangster wants a slow, painful death. He knocks out the mob boss and arrests

K is sentenced to death and sent to prison. In the final scene, Dong-soo is sent to the same prison. As he enters the showers where K is hiding, Dong-soo smiles and says, "I told you there are three men who will risk their lives to catch you." If you'd like to dive deeper into this world: of the characters' moral gray areas Comparisons to the real-life "Cheonan serial killer" case

They find K’s weapon—a specific type of knife—and track his stolen vehicle.