C891 Cases of Disappearance

The so-called disappearance of a secret chamber is a case of disappearance that occurred in a sealed space!" In fact, this was a case that did not conform to normal logic and reality! Imagine, in a closed space with no one in it, how could a disappearance happen for no reason at all? Even if I want to disappear, I must be hiding somewhere. As long as people search for me