Lee Hee-jun Lost his Parents to a Serial Killer in "Mouse"

"Mouse" Lee Hee-jun's past was revealed.

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On the first episode of the new tvN drama "Mouse", Go Moo-chi's (Lee Hee-jun) parents were murdered.

Young Go Moo-chi (Song Min-jae) was hiding from a serial killer that was murdering his parents as well as young Go Moo-won.

Young Go Moo-chi was found by the police and Park Doo-seok asked if he saw the killer's face.

Go Moo-chi was so petrified he couldn't answer and Park Doo-seok said, "I have to catch the killer. He took my daughter. I don't know if she's still alive".

Young Go Moo-chi was horrified when he saw the poster of Han Seo-joon (Ahn Jae-wook) and Park Doo-seok ran straightaway to Han Seo-joon.