They were on a rescue sortie but fell victims of a helicopter crash off the Arctic base. The two survivors are trying to find a way out and encounter strange situations. Staying awake causes weird imperceptions, from a harmless chromatism to dangerous hallucinations. The longer you are up, the worse it gets. The team slowly go mad and eventually reach the point where they can no longer trust their senses. But the worst is still to fall asleep, as this attracts aliens monsters that devour people!
