: In real life, cooperation between a crime boss and a detective is rarely as direct or formal as the "alliance" seen on screen.
: The film is set in the summer of 2005. This aligns with the era when South Korea was grappling with several high-profile serial murder cases, including those of Yoo Young-chul and Jeong Nam-gyu (the "Rainy Thursday Killer").
: In real life, cooperation between a crime boss and a detective is rarely as direct or formal as the "alliance" seen on screen.
: The film is set in the summer of 2005. This aligns with the era when South Korea was grappling with several high-profile serial murder cases, including those of Yoo Young-chul and Jeong Nam-gyu (the "Rainy Thursday Killer").