The faction “Dolg” is one of the powerful forces in the Exclusion Zone. Stalkers in this faction are united by a single goal: to end the existence of the Zone itself. With harsh discipline and the unofficial support of the military, these stalkers kill mutants, conducting periodic raids into the Zone. The main task of this group is to destroy all mutants and stop the spread of artifacts beyond the Zone’s territory. What started as an ordinary “clean-up” operation for the Dolg faction turned into a serious battle between humans and mutants. At the beginning, the faction almost wiped out the lair of bloodsuckers, but at the end it nearly lost most of its quads—trapped in a deadly trap left by the mutants. Only Rich’s instincts saved everyone from death. However, Rich himself ended up in a trap. The clan leader doesn’t believe his men can die—because one of them is his best friend—so he makes a desperate move: he asks for help from stalkers, specifically from the loner stalker Grach. But even he demands a favor in return. After passing difficult trials, all the heroes enter an unequal and deadly battle with the army of mutants—along with new mutants calling themselves the “Masters of the Zone.”