Hyunjin, a test taker, moves into an old apartment. There are strange sounds from next door where a strange boy named Hyunggu lives. One day, Hyunggu and his mother are cruelly murdered.测试员Hyunjin搬进一间老公寓。 来自隔壁的奇怪的声音，一个名叫Hyunggu的奇怪男孩住。 有一天，Hyunggu和他的母亲遭到残酷的谋杀。