Horror Story: The Neighbor's Window

Li Xiao Qiong accompanies her boyfriend Guo Jun, into a secluded small building. She founds there, a mysterious little girl, hidden behind the window in one of the rooms. But neighbors denied the existence of the girl, and they didn't hear of anyone, living in the building with the child. From then on, confused Li Xiao Qiong tries to find out who the mysterious girl really is.
~~Adapted from the suspense writer Zhou Hao Hui's novel "Girl in the Dark".