Kang Jin-mook Is the secondary antagonist of 2021 crime thriller K-drama Beyond Evil. He is the serial killer moonlights as an owner of a supermarket.
He is the false archnemesis of the duo policemen Han Joo-won and Lee Dong-sik, especially Dong-sik due to him responsible for the death of Dong-sik's younger sister and his own false imprisonment. However, it is turned out that the real killer of Dong-sik's sister is police chief Han Ki-Hwan and Jin-mook witnessed the killing.
He is portrayed by Lee Kyu-hoi, who also portrayed Kim Yun-tae in Squid Game, and by Park Kwang-il as a child.
Biography[]
Kang Jin-Mook was adopted by Dong-sik's family as a child due to his mental disability, making him Dong-sik's adopted brother. As an adult, he owns Manyang Supermarket and has a rebellious daughter named Kang Min-jung. However, it is revealed that his mental infirm is just a facade to cover his twisted psychopathy and thirst for blood.
He fell in love with a prostitute named Yoon Mi-hye but she rejected him, causing his twisted mind to finally erupt and he started killing young women out of spite. Additionally, he often choose October 21st to prey on his victims since it is a date when Mi-hye left him. Mi-hye became aware of his killing and faked her death to get away from him.
One night, after finishing off a murder of a woman, he stumped upon the scene where police chief Han Ki-Hwan ran over his adopted sister and called his crony, Lee Chang-Jin to dispose of her. Taking the opportunity when Lee Chang-Jin was distracted, he stole his adopted sister's corpse and buried in the fireplace of his house. His adopted mother knew the truth but kept it a secret. Eventually, Dong-sik was framed to be his sister's killer thanked to Ki-Hwan's influence but was released later on due to the lack of concrete evidences.
In the present, his daughter Min-Jung always suspects that Jin-Mook is not her biological father. One day, Jin-mook snapped at the topic and brutally murdered her. Her adopted uncle discovered Min-Jung's phone at Manyang Supermarket as well as items of the previous victims and realized that Jin-Mook was the killer all along. However, since he lacked concrete evidences, Dong-sik decided to wait for the right opportunities to expose Jin-Mook.
Eventually, after many diggings, Dong-sik and Han Joo-won successfully bait him to dig up the body of his victim in his house and catch him red-handed. He is then finally convicted for his crime. It is later revealed that Min-jung's suspicion was correct as she was not his biological daughter.
He is eventually murdered by Lee Chang-Jin to silent him from revealing Ki-Hwan's killing but not before stating to Dong-sik that he never actually killed Dong-sik's younger sister. It is later revealed that he left a will for Dong-sik to gain ownership of his house and his supermarket.
Dong-sik's mother eventually revealed the location of where Jin-mook buried his sister. Through forensic examination, Dong-sik realizes that his sister was killed in a car crash and eventually he finds out that Ki-Hwan was behind the killing after Joo-Won reveals the truth to him through a secret recording in the conversation between Ki-Hwan and Lee Chang-Jin.