: The core hook—a mob boss surviving an attack and teaming up with a detective—is inspired by the reality of how some Korean criminals and law enforcement have historically intersected during high-profile manhunts.
Some reports suggest the film draws inspiration from the atmosphere surrounding the infamous "Rainy Thursday Killer" (Lee Choon-jae), who terrorized the Hwaseong area. While the specific plot points of the movie are largely fabricated, the fear of an elusive, seemingly unstoppable force is deeply rooted in the true stories of serial killers like Yoo Young-chul, who targeted multiple people in a short time, similar to the killer in the film. The Gangster and The Cop: Myth vs. Reality
To understand the factual background of the film, one must look back to the mid-2000s, an era when South Korea was plagued by a terrifying wave of real-life serial killers. is the gangster the cop the devil based on true story
In both the real 2005 case and the 2019 film, the police are incompetent. They cannot catch the killer because they are trapped by their own bureaucracy—they look for motives, patterns, and connections. A random serial killer who attacks strangers is their nightmare.
In real life, Yoo Young-chul was famously captured with the help of brothel owners and pimps : The core hook—a mob boss surviving an
In reality, Kim Tae-chon just beat the guy and let him go. That makes for a funny anecdote, but not a two-hour thriller.
is based on a true story , though it takes significant creative liberties to heighten the action and drama. The film's core premise—an unlikely alliance between a mob boss and a detective to catch a serial killer—draws inspiration from real criminal events in South Korea during the mid-2000s. 🔍 The Real Inspiration The Gangster and The Cop: Myth vs
The core inciting event—the killer stabbing a gangster who subsequently survives—is the primary "true" element the filmmakers utilized to launch the plot.
While the movie plays out like a stylized, hyper-violent comic book, it opens with a title card claiming inspiration from true events. This leaves many viewers asking: Is The Gangster, The Cop, The Devil actually based on a true story?
In the film, the serial killer "K" is a faceless, spectral figure who kills for a twisted sense of pleasure. He has no clear motive, lacks empathy, and is always smiling. This character is almost entirely the invention of screenwriter Kim Min-seok.
But if you’ve ever wondered, , the answer is a fascinating mix of "yes" and "no." While the specific alliance depicted in the film is largely a product of cinematic imagination, the movie is heavily inspired by real-life serial murder cases that gripped South Korea in the early 2000s. The Real Inspiration: The Chul-hong Case