One contestant seems on the brink of insanity and needs to be restrained, while another comes close to death as everyone must deal with plunging temperatures and a loss of hope after some members of the group set off to explore the beacon, while others stay behind to find food and clothing at the abandoned producers' camp.

Johnny, Daniel, Joyce, and Sam continue searching for the beacon despite Sam's frostbitten foot, but disorientation sets in when the signal light goes out. Meanwhile, Neeko, Sabina, Annie, and Esther go into the woods to find the missing Irene and Miljan, and make a grisly discovery.

While Johnny, Sam, and Daniel explore the research station, trying to restore the power, they make several grisly discoveries. Meanwhile, at the settlement one of the missing contestants resurfaces and warns Sabina and Neeko that "they" are coming... and they're neither animal nor human.

The Evenki capture Neeko, Sabina, and Miljan, but reunite them with their friends. While the tribesmen explain that the contestants violated their enemy's territory, the group at the science center attempt to make contact with the outside world.