I just remember what was written in the diary:
Some people have spent their entire lives commuting here;
There are people here who are forced to repeat the same day;
Someone fell out of their end here;
Some people also find that they can never find the real exit.
A security consultant, a local reporter, and a documentary camera broke into an old Chongqing building that was used as a "space experiment sample" - is what is hidden in the stairs the residents' erased memories, or is it a time loop that the entire city is unwilling to admit?