▁tra pped ▁in ▁the ▁School ▁because ▁of ▁the ▁am u let ' s ▁power ▁and ▁could ▁not ▁pass ▁on . ▁ ▁The ▁music ▁teacher , ▁Ji - won , ▁had ▁discovered ▁the ▁school ' s ▁past ▁and ▁began ▁to ▁study ▁it ▁and ▁deeply ▁believed ▁that ▁he ▁could ▁res ur rect ▁the ▁dead ▁using ▁the ▁power ▁of ▁f eng ▁sh ui ▁in ▁the ▁area . ▁One ▁day , ▁Se ong - ah ' s ▁mother ▁E un - mi ▁visited ▁and ▁asked ▁for ▁the ▁res urre ction ▁of ▁her ▁daughter ▁with ▁Ji - won ▁dec iding ▁to ▁help ▁her ▁out ▁so ▁he ▁can ▁prove ▁that ▁his ▁theory ▁was ▁right . ▁To ▁rev ive ▁the ▁dead , ▁three ▁people ▁were ▁needed : ▁▁ ▁A ▁person ▁who ▁calls ▁the ▁dead ▁( Se ong - ah ' s ▁mother , ▁Ch oi ▁E un - mi ) ▁▁ ▁A ▁person ▁who ▁can ▁break ▁the ▁se als ▁using ▁the ▁am u lets ▁( one ▁who ▁sees ▁g hosts ▁- ▁the ▁music ▁teacher , ▁Ji - won ) ▁▁ ▁A ▁sacrifice ▁( Na - ye ong ). ▁ ▁They ▁successfully ▁called ▁Na - ye ong ▁to ▁the ▁school ▁at ▁night , ▁but ▁somehow , ▁the ▁rit ual ▁went ▁wrong ▁because ▁of ▁the ▁master ▁of ▁the ▁lab yr inth ▁inter fer ing ▁and ▁stopping ▁Na - ye ong ▁being ▁sacrific ed . ▁The ▁se als ▁also ▁had ▁to ▁be ▁broken ▁one ▁by ▁one , ▁with ▁some ▁se als ▁having ▁to ▁remain ▁un bro ken ▁while ▁the ▁land ▁reg ains ▁its