You need to find Nadia Curie in the Chernobyl Exclusion Zone. A quotation from the Book of Revelations will help you in your search: “And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.” However, the train does not stop by the Exclusion Zone, so you need to pull the emergency brake in time. He also warns you that there are a lot of forest fires in the zone, which stir up the radioactive particles, so be careful! The fence of the Exclusion Zone comes into view and you pull the emergency brake.