
Valera brings Katya to the base of the survivors, who is looking for evidence of the involvement of Vershina in the creation and spread of the virus. Valera and Katya go on scouting to find a spare base. During the raids, they capture a mercenary who collects capsules from the ear shells of the mutants.
A month ago in Moscow, there was an outbreak of an unknown disease with a 100% fatal outcome for the men, the girls turned into mysterious and bloodthirsty creatures, murders. Survivors wake up in the morning from the unexpected screams of the mutants that penetrated the base. It turns out that someone opened the door to the mutants from the inside. But who opened the door and why?
Valera's plan to break the checkpoint failed. Nick accuses Scatha of inactivity and softness and breaks off relations with him, but in fact, the reason is much deeper - the girl is in love with another member of the group and can not hide her feelings anymore. Who is in love with the impudent Nick? Who will betray friends to save himself?