On their journey to the radio beacon Joyce, Sam, Daniel, and Johnny run across what appears to be the wreckage of the Siberia helicopter. There are no bodies there, which can be either reassuring or worrying, depending on how you look at it. And the next morning, there's snow everywhere! It's quite pretty, but the Siberians don't see it that way. Sabina gets people mad at her when she reveals that she stole a bunch of supplies and hid them in a cave. And Miljan's started talking about killing Irene, because she's a liability. But first, a group heads out to the producers' camp to scavenge for winter clothing and food. Which they should have done the first time they were there, really.
There's a treacherous river crossing on the way to the radio beacon, and Sam's foot breaks through the ice. This, of course, develops into frostbite immediately, and eventually he falls down a hill and can't go on. Johnny and Joyce find shelter by a fallen tree, where they can get a fire started but Sam's not doing at all well. This expedition has taken two days already, and they're still not at the beacon. They do a lot of walking.
At the producers' camp, Esther finds the key to the Revealer and doesn't tell anyone. When they get back to the camp, she sneaks off and does something. Then the horn starts up, and everyone runs out. Miljan pounds on the Revealer like a fool, and then he pouts when Neeko stops him. The pouting turns homicidal when Miljan tries to strangle Irene, which gets him tied to a chair in one of the cabins. Then Esther claims to notice the Revealer key, so everyone has access to matches, vodka, sleeping pills, and a Dostoevsky novel. But when Esther takes water to Miljan, he somehow knows that she stole something, and he threatens to tell everyone. This probably has something to do with the way everyone wakes up the next day with a headache to find that Irene is missing. Neeko finds something disturbing in the other cabin, but we don't learn if Miljan is missing or just dead.
The trek to the mysterious tower (by Johnny, Sam, Daniel, and Joyce) takes a break so Joyce can drink some water. Daniel suggests that maybe the blackened area they saw was caused by an explosion that put so much debris in the air that the sky turned a weird color. That nearly sounds plausible, but refraction of light doesn't explain why the sky was so bright. Nobody buys his theory, although it's probably no sillier than whatever the truth turns out to be. Johnny gets distracted and runs down the hill to check something out. He's found a wrecked helicopter door! And it has the "SIBERIA" logo on it. That's worrying.
Joyce manages to find the rest of the helicopter's wreckage strewn around some trees. Daniel thinks it must have fallen out of the sky, which sounds logical. Helicopters live in the sky, right? There are no bodies, which seems weird. Joyce finds something to examine, which lets Johnny confab with the menfolk. He says it's going to be dark soon, so they need to find shelter. We see that Joyce is crying over something labeled "Jonathan Buckley."
Morning in the camp. It's cold in the cabin. Irene is having a bad time, and Annie soothes her. The discussion mostly centers on how crazy cold it is. Miljan can't open his cabin's door, which turns out to be because there's like three feet of snow out there. Neeko insists that it isn't possible, because it was "boiling hot" yesterday. They should have had someone on the last episode mention how hot it was at the time! That would make this much more interesting from the audience's point of view. They could have worked it in while they were carrying all that wood for the signal fire.
The away team wakes up huddled under a lean-to made of helicopter parts. They are also beset by snow! Joyce suggests starting a fire, and Sam says it's too wet. Johnny says to start walking, because they're closer to the beacon than they are to the settlement. The beacon is that tower with the blinking red light that they're looking for. Nobody really knows what it is. Although it's clearly a radio tower.
The camp looks pretty all covered with snow. Esther is shivering and is not in a position to appreciate nature's beauty. Annie reports that Irene is not doing well. Irene asks Annie to pray for her. Annie claims she doesn't know what to say, but she comes up with some rhyming couplets about the Angel of God. She explains that she "used to be" religious. The boys come over with the blankets and mattresses from the other cabin. Sabina is apparently missing, which they should really be used to by now.