o ▁has ▁also ▁been ▁kid n apped ▁by ▁a ▁myster ious ▁woman . ▁They ▁fail ▁to ▁save ▁her ▁and ▁Ch ang - wo ok ▁str angles ▁the ▁woman ▁to ▁death . ▁ ▁A ▁mem orial ▁is ▁held ▁for ▁the ▁students ▁killed , ▁then ▁I - na ▁is ▁kid n apped ▁un not iced . ▁One ▁final ▁question ▁is ▁pos ed : ▁have ▁the ▁person ▁who ▁killed ▁his ▁daughter ▁step ▁forward ▁and ▁conf ess . ▁The ▁person ▁in ▁question , ▁a ▁now - de ment ed ▁Ch ang - wo ok , ▁reve als ▁himself ▁and ▁is ▁killed ▁by ▁the ▁master mind , ▁who ▁turns ▁out ▁to ▁be ▁Mr . ▁Kim . ▁I - na ▁is ▁then ▁fre ed ▁by ▁So - ye ong . ▁ ▁Flash back s ▁reve al ▁that ▁Kim ' s ▁daughter , ▁Kim ▁Ji - won , ▁worked ▁hard ▁to ▁enter ▁the ▁el ite ▁class . ▁However , ▁the ▁parents ▁of ▁the ▁killed ▁students ▁b rib ed ▁Ch ang - wo ok ▁for ▁the ▁entrance ▁test ▁answers , ▁giving ▁them ▁an ▁unf air ▁advantage . ▁After ▁being ▁dis qual ified ▁and ▁finding ▁out ▁about ▁the ▁fact , ▁Ji - won ▁confront ed ▁Ch ang - wo ok ▁and ▁he ▁k ills ▁her ▁to ▁cover ▁up ▁his ▁mis con duct . ▁The ▁sole ▁witness ▁to ▁the ▁incident , ▁Be om , ▁slowly ▁became ▁mad ▁as ▁he ▁felt ▁that ▁Ji - won ▁had ▁been ▁ha un ting ▁him ▁ever ▁since . ▁Mr . ▁Kim ▁and ▁his ▁wife ▁( the ▁woman ▁who