Mok Jin-woo also known as the Fishnet Stocking Killer is the primary antagonist of the 2017 acclaim crime drama series Tunnel. He is a misogynistic serial killer who disguises himself as forensic doctor to prey on young women who reminds him of his promiscuous mother. He is known to kill his victims by strangling them to dead with fishnet stockings.
He is the archnemesis of the duo of homicide detectives Park Gwang-ho and Kim Seon-jae with him being responsible for Seon-jae's mother death.
Background[]
Mok Jin-woo's mother was a prostitute who emotionally and verbally abused him as the result it caused him to hate provocatively-dressed women as they reminded him of his unloving and abusive mother. He also targeted women whom he thought was sinful.
Eventually, he snapped and went on a killing spree and racked up 5 women victims. One of the women was Kim Seon-jae's mother whom he killed just because she smiled to a stranger. He then became a forensic doctor to cover his tracks. He also a tendency to mark his victims with a ballpoint pen in their ankles with the number of dots representing the number order of those he had killed.
After killing a fifth victim, he was chased into mysterious tunnel by homicide detective Park Gwang-ho and Gwang-ho was transported to the future in 2016.
Tunnel[]
As Gwang-ho struck in the future of 2016, he took the identity of a dead cop whose name is the same as his name. He partnered with Seon-jae who has became a homicide detective to find his mother's killer and Shin Jae-yi who turned out to be his unborn daughter in the past. Gwang-ho tried his worst to try to go back to the past of the 1986 by constantly crossing the tunnel to no prevail.
Realizing that God has made him stuck in the past to find the Fishnet Stocking Killer. he decided to stay in the future and catch the killer. After solving multiple serious case involving identity thief, arson and tragic murder, he trio stumped upon Jung Ho-young, a copycat killer of the Fishnet Stocking Killer. Ho-young was a psychopath ever since he was a boy as he started killing dogs and then moved to human. Eventually, Gwang-ho; Seon-Jae and Jae-yi managed to corner him and he confessed his crime after being presented undeniable evidences. Before he was sent to prison to serve his life sentence, he stated that the 5 women who was killed in a murder case, Gwang-ho and Seon-Jae were investigating were not his doing. Furthermore, it is revealed that Ho-young was a witness of one of Jin-woo's murder in the past and that experience was driven him into a copycat serial killer.
Jin-woo visited Ho-young in prison and played mind game with him until Ho-young committed suicide so Ho-young would not testify him but not before Ho-young realized that Jin-woo was the original Fishnet Stocking Murder. Before he ended his life, Ho-young left a clue about Jin-woo by leaving before a note simply stated "Noel". It is turned out that Noel was the name of the ballpoint pen given to Jin-woo by his mother.
Gwang-ho figured out that Jin-woo was the real and original fishnet stocking killer after he realized that no forensic doctor could know how many time a victim was strangled unless they are the killers themselves. Gwang-ho chased Jin-woo to retrieve the pen but accidentally went back to 1986. He entrusted his wife of the pen before going back to 2016. Thanked to Gwang-ho's action in the past, the ballpoint pen was safekept by Jae-yi who hid it under her pink teddy bear.
Jin-woo kidnapped Jae-yi to inquire about the pen but it is turned out to be the trap as Jae-yi used herself as bait for Gwang-ho and Seon-Jae as well as the cops to capture him. After being arrested, Jin-woo showed no remorse of his crime and Seon-Jae nearly choked him to death in a fit of rage for killing his mother just because she made an innocent smile toward a stranger and he killed her because Jin-woo's twisted mind told him that she was sinful. He was then sentenced to death for his crime.
As the crime was solved, Gwang-ho bid Jae-yi and Seon-Jae farewell and went back to his time. Thanked to the knowledge in the future, he managed to arrest and imprison the young Jin-woo before he committed any more crime in the future, ending his reign of terror at the earliest stage.