Tao Jinyan, a sophomore girl who just moved into the dormitory this year, heard Ye Nuan, a girl in the same dormitory, talk about a girl who jumped from the building in 513 this summer across the street. From then on, the supernatural experiences surrounding her and three girls in the same dormitory began.
First, Ye Nuan fell asleep strangely, and a strange and murderous song kept playing. Then horrific things happened one after another, including the mysterious identity of Mu Zi, the only girl in 513.
Finally, when the truth comes out, what will Tao Jinyan do...