Approximately one year has passed since the story of the stalker Marked. You are military lieutenant Priboy Slipchenko, and you were sent to the Zone... There was a secret organization called the UHSF, and they were responsible for the incident. They were based in the Dead City, but mercenaries drove them out in the late 80s. The organization collapsed and its last members disappeared. One way or another, this story is connected to the Marked One, and you will eventually find out how.