Behind every door, there is an unrested soul hidden - their obsession is not resentment, but waiting, guilt, fear, and forgetfulness. Xiao Shuanzi has been waiting for a hundred years for someone to come to him. Grandma Liu has been waiting for twenty years for a son who will never come. Zhou Xiaoman waited for three years for her father to pick her up. The little girl in Building 17 waited countless nights for her mother to open the door.
What the people behind the door have to do is not kill these souls - they need to hear them.
