. While the specific "unlikely alliance" depicted is a dramatized cinematic conceit, the movie draws inspiration from real serial killings that occurred in South Korea during the mid-2000s. Origins and Inspiration
The film’s antagonist remarks that even with a death penalty, he "won't die". This mirrors the real-world situation of Yoo Young-chul, who was sentenced to death in 2005 but remains on death row today because South Korea has maintained a moratorium on executions since 1997. Fact vs. Fiction in the Film is the gangster the cop the devil based on true story
: The movie is loosely based on a string of murders from 2005 . The "Devil" character (Kang Kyung-ho) is often compared to real-life South Korean serial killers like Yoo Young-chul , known as the "Raincoat Killer," who committed a series of murders between 2003 and 2004. This mirrors the real-world situation of Yoo Young-chul,