Journalist Masha Zotova accompanies Andreas Berg, who works for International Geographic magazine, to the Kuril Islands. The business trip is ordinary, but this is a good reason to take your mind off the longing for your departed husband. Berg is very curious and actively explores all local attractions. One day they went to the caves, to the so-called Imperial Baths. There Masha found a strange stone, which turned out to be a gold bar. Gradually, the journalists realize that they were involved in a dark story, as a result of which a person has already died...