The most thrilling aspect of the movie—a massive gangster surviving an attack and launching a underworld manhunt—is where the film blends fact with folklore.
Detective Jung Tae-suk realizes that the mob boss's attacker is the same serial killer he has been tracking. Because the police force is choked by bureaucracy and corruption, the cop strikes a secret deal with the gangster: whoever catches the killer first gets to deal with him by their own laws (legal trial vs. mob execution). They pool together police databases and underworld manpower.
The 2019 South Korean action-thriller The Gangster, the Cop, the Devil (directed by Lee Won-tae) hooks audiences with an outrageous premise: a powerful mafia boss and a rogue police detective team up to catch a sadistic serial killer. Because the movie begins with a standard "based on true events" disclaimer, viewers often wonder how much of this gripping thriller actually happened.
Director Lee Won-tae used the real-life Cheonan killer case as a narrative anchor to explore deeper philosophical questions about justice. By placing a "bad guy" (the gangster) and a "good guy" (the cop) on the same side against a "pure evil guy" (the devil), the film forces the audience to question the system. is the gangster the cop the devil based on true story
Is The Gangster, the Cop, the Devil Based on a True Story? The Real Criminal History Behind the Film
The central premise of the film hinges on the "devil" (the killer) attacking the "gangster" (Jang Dong-su), making it personal for the underworld boss. In the film:
The 2019 South Korean action-thriller is loosely based on a true story, drawing heavily from real serial killer investigations that shook South Korea during the mid-2000s. Directed by Lee Won-tae and starring Ma Dong-seok (Don Lee), the film opens with a title card stating it is inspired by true events. However, while the cinematic narrative crafts a highly stylized alliance between a mob boss and a rogue detective, the real-world criminal case behind it is grounded in the terrifying history of South Korea's most notorious killers. The Movie vs. Reality: The Core Premise The most thrilling aspect of the movie—a massive
The gangster He began as many in his world did: small-time theft, running errands for older criminals, then moving up by demonstrating ruthlessness and a strategic mind. Unlike cartoonish mob bosses, he blended brute force with business sense—diversifying revenue streams, bribing mid-level officials, and investing in legitimate enterprises to launder money and build influence. Publicly, he cultivated a persona that mixed generosity—helping local families, funding community events—with brutal suppression of rivals. That duality protected him: to some he was a patron, to others an unavoidable tyrant.
The Real-Life Inspiration: South Korea's 2000s Serial Killer Wave
In post-IMF crisis Korea, police corruption was rampant, and gangsters wielded real power in local neighborhoods. The movie uses the serial killer as a catalyst to expose an uncomfortable truth: sometimes, the devil you know (the gangster) is more reliable than the devil you don’t (the system). mob execution)
The movie also touches on a very real frustration within the Korean public at the time: the difficulty of catching "random" killers before the widespread use of CCTV and advanced DNA profiling. By grounding the "Devil" in the traits of real murderers like Yoo Young-chul, the film taps into a genuine historical anxiety. The Hollywood Connection
The cop Across the city, a detective rose through a different set of hardships. Not an idealist blinded by romance, but a practical officer who had seen the consequences when corruption went unchecked: witnesses threatened, prosecutions dropped, and ordinary people trapped between criminals and unresponsive institutions. He kept meticulous records, followed patterns others overlooked, and slowly assembled a casefile that reached beyond petty arrests into the architecture of the gangster’s operation. He took risks—working undercover contacts, pushing for search warrants, and confronting superiors who preferred quiet settlements. Bravery for him was procedural: persistence, paperwork, and patience.
Conclusion The tale of the gangster, the cop, and the Devil is not simply a crime saga; it is a mirror showing what happens when ambition, fear, and institutional weakness intersect. It is a reminder that fighting organized crime needs more than dramatic raids: it needs resilient institutions, vigilant citizens, and sustained political will. The gangster’s rise and fall, the detective’s dogged pursuit, and the partial unmasking of the Devil together form a cautionary, if ultimately hopeful, story about how societies confront the forces that exploit their most fragile seams.