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Park Cheol-woong is the self-described manger of prison hotel in Oldboy (2003) when Oh Dae-su was held in hotel room for 15 years and Park met Lee Woo-jin. When Dae-su tracked the place where he was held for 15 years he attacked Park's bodyguards and tortured him by pulling his teeth.
Park sought revenge against Dae-su and held Mi-do as hostage.
Park tried to pull Dae-su's teeth but Woo-jin stopped him by calling him.
It is revealed that Mr Han chopped Park's hand as gift to Dae-su and Mi-do
Park became redeemed villain for helping Dae-su in solving the mystery