Karelian Area. Prevent the Zone

No one really understood what the Chernobyl Zone actually was. And when it collapsed, this question remained unanswered.
Years later, a former inhabitant of the Chernobyl Exclusion Zone, nicknamed Fisherman, while living a quiet old age in the depths of Karelia, becomes a witness to strange events that remind him too much of the past.
A border guard major, who accidentally wandered into his house following the call of a mysterious crystal in an old quarry, inadvertently helps the Fisherman finally understand what the Zone is. The old man, experienced in surviving in an anomalous territory, sets off with the major on a dangerous trip to find a person at a shapeshifting nuclear power plant and prevent the formation of a new Exclusion Zone...