The author of the book is Ruslan Goldberg. This book tells about a man who lost his memory after a disaster. Having come to his senses, he does not understand where he is and where he ended up. He found himself in a place inhabited by occult organizations. They engaged in forbidden calls and had connections with other worlds; all this posed a huge danger to people and to themselves. The main character needs to figure out how he ended up here and how to get out of here, but everything turned out to be not so simple, he will have to put an end to these cults. One demon recognizes his abilities and tells him what's what.