In that old building with peeling walls and a damp, musty smell, there was a rusty elevator. The creaking sound when it was running was like a wail, and the three yellowed mirrors reflected distorted figures, occasionally mixed with other things... The newly moved Lin Wei thought this was just an ordinary old building, until she was riding the elevator alone late at night, and heard the cry of a child above her head. After the lights went out, she caught a glimpse of a pale face flashing in the mirror.