Somewhere in the depths of the Zone, in the “shimmering” city of Limansk, the scientific expedition of Professor Titarenko disappears. The professor transmits a request for help “outside” and reports that he has made an incredible scientific discovery in the Zone. The professor's daughter, fourteen-year-old Masha, decides to go in search of her father herself and hires a team of stalkers. However, she is not the only one interested in finding the professor - powerful forces are interfering in the matter. A hunt has been announced for the “rescue squad” throughout the Zone. What did the professor discover - the path to the Monolith, the dark secret of the origin of the Zone, or something completely unexpected? Why is he being hunted? Where could he hide? Who are they - the secret enemies of the expedition, and who are the mysterious helpers? Come out to the “Bottom Shore” and find out everything!