The twenty-first floor of a skyscraper is like an independent island, gathering the alienation and secrets of modern cities. A murder case with a neat technique and a strange scene occurred here. The deceased died in his sleep. The only fingerprint on the scene belonged to his girlfriend who had an irrefutable alibi. The police detectives responsible for the case/or reporters interested in this discovered that this was not the first "weird story" on the 21st floor. The air here seems to be filled with echoes of historical unsolved cases: some residents have reported strange noises similar to those before the incident at the "Hintkaefek" farm; in the missing persons files, the records related to this place are surprisingly similar to the collective loss of the "Yuba County Five"; even among the dusty old things, fragments similar to the multiple false identifications used by the "Isdas Woman" appeared. Is it a coincidence, or is it some kind of dark fate pulling the strings? Are the current murders just the latest chapter in a huge lie that spans decades? To uncover the truth behind the twenty-first floor, you may need to first listen to those silent cries from the past.
