Cheng Xin is an ordinary social worker who works step by step during the day and goes to bed at midnight.
Recently she encountered a trouble. Every early morning, there were constant knocking sounds outside her window, but she lived on the seventeenth floor? !
Cheng Xin finally plucked up the courage to open the curtains and saw a face floating outside the glass.
A face exactly like his own.
Purpose: Try to survive
