In the depths of the time

Creating a time machine is the biggest dream of mankind. Well, who just did not puzzle over this issue. They say that even Leonardo da Vinci was looking for approaches, because, among other things, he was an excellent engineer. The theoretical opportunity to get into the past was relatively recently confirmed by Stephen Hawking, promoting his theory of black holes. But all these are high matters, and in life it happens in a completely different way-ordinary and mundane.
Once in Altai - a place in all respects enchanted, where all sorts of miracles happen - when adjusting equipment in one of the abandoned mines there was an accident. Her only witness, mechanic Vasily, is unknown where he disappeared for three days, although it seemed to him that he had disconnected for only a couple of minutes. It happens, of course, but as soon as Vasily came to his senses (and for others - he finally appeared), the competent authorities became interested in them. In parallel, scientists conduct the investigation, and both sides, oddly enough, come to similar conclusions. Butterfly Effect? May be