1948 A school was made on a cemetery ground.At the school hostel's backyard has a forest,at the there it has big giant rocks behind the rocks was a hiden grave. 2010 YoonA went to her univercity and she was a new student. When she went to her dorm she saw her room he was acute nerd name kikwang.When they both started to get to know each other at the backyard they heard a strange sound saying 'who is it'.they both followed the voice until without noticing they went to the forest behind the rocks and yoona did'nt know that she stepped on the spirits grave.When the clock strike twelve her life changed to be horrifying.So as kikwang.