Seulgi rented an apartment near on her new university. There's a rumor, and even the landlady told her that she should be careful, a shadow is lurking inside her apartment. That's why, it doesn't have occupants in six months and Seulgi was the first one to rent from a long time already.

Seulgi isn't the type who believes in ghosts or whatever so she just shrugged all the rumors. But after her first night, she is starting to be creeped out. In her pherephiral view, she can see a shadow of a girl running then gone. Sometimes, when she got home from school, her counted pringles are decreasing each day. Sometimes some chocolates on her fridge is going missing. And when she goes to her bed, it's wrinkled like somebody laid on it when she still remembered clearly that when she left her bed, it isn't. Also when Seulgi changes her clothes, she can feel eyes looking inside her closet but when she opened the closet, there is no one.

Seulgi tried to be brave but each day she is starting to freak out more. Well, she already freaked out when she learned the story of the family murdered in her own apartment 10 years ago.

Will she be less freaked out when she will know the truth behind that spooky shadow?