
After talking with the main stalkers, we find out what they are holding hostage. Scar goes to meet the stalkers behind the embankment. He does not know where the package is now and wants our hero who works for the Clear Sky group to find out where she disappeared and who has it in his hands. Sidorovich is waiting for the order of the parcel from the stalkers, but the stalkers had a falling out with the military, through which the parcel was supposed to go into the hands of Sidorovich. Our stalker Scar is sent to the aid of the Clear Sky grouping in order to increase its influence on the territory and help against another group "Renegades" Cordon. Therefore, Lebedev wants him to find out who could get into the center of the Zone and go there for him. Scar has unusual abilities, but with each release his nervous system burns out, and if the emissions are not stopped, then the Scar will die. And therefore, the Zone, trying to protect itself, launches frequent emissions. In the course of a conversation with Lebedev, he finds out that the constant emissions may be due to the fact that someone in the Zone made his way to the center, breaking a brain burner. Scar, helping the fighters of the "Clear Sky" group at the outpost, again falls under an unexpected release and survives. Different groups became disunited and began to fight for possession of the territory. The release also had a strange effect on the people in the Zone.

And the places of destruction, where even the most desperate person did not meddle, became, on the contrary, bladeless. Where there were no anomalies, they are now. Previously, where there were safe places and stalkers could walk in these places, it became dangerous. Scar discovers that the last blowout changed the Zone. Scar strangely survives in this release and is found by the mysterious group "Clear Sky", which is studying the Zone and all the phenomena that occur in it.


Clear Sky begins with the fact that a group of scientists, together with a mercenary nicknamed Scar, fall under the Zone's release.
