The Gangster, The Cop and The Devil (2019)

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Jang Dong Soo is a gang boss in Cheonan. He becomes the target of a serial killer, Kang Kyung Ho, but ultimately survives the attack. He is the only person to have ever survived from an attack by this serial killer. Detective Jung Tae Seok hates organized crime but is forced to work with Jang Dong Soo in order to catch the serial killer.