Forced underground by the next ice age, a struggling outpost of survivors must fight to preserve humanity against a threat even more savage than nature.

Sam (Kevin Zegers) has told Mason to let Hal go, as he has chosen to leave. Hal says that it’s not a choice, it’s survival, and one less person will mean more food for the rest. Sam explains that people from the cities which reached one of the colonies considered themselves lucky to reach one of the colonies. At the beginning, they had to make do with crammed conditions, but then, people’s life expectancy started to dwindle, and now, they are not crammed at all. At colony 7, attempts to keep seeds for when the Ice Age finishes have been done. Sam tells Briggs that Mason killed Hal – Briggs doesn’t like that.