The game is set in an alternative reality , where a second nuclear disaster occurs at the Chernobyl Nuclear Power Plant Exclusion Zone in the near future and causes strange changes in the area around it .
It features an alternate reality theme , where the second nuclear disaster happens at the Chernobyl Nuclear Power Plant in the near future and makes strange changes happen to the area around it , which create a lot of mutated animals , plants , and change the laws of Physics .