In the old "Xingfuli" community, Chen Jianguo, an old man living alone, receives an elevator request for the 18th floor at 3 a. M. Every day, but the elevator is empty according to the surveillance. With the intervention of young female reporter Lin Xiaoyu, a series of strange events happened one after another. When the firefighters demolished the elevator, the baby shoes with Chen Jianguo's name engraved on the top of the car were exposed, and his twin brother who should have died 60 years ago seemed to be approaching step by step from the shadow of time...
