In 1905, on a rescue mission to the North Pole to retrieve an previous pal and his misplaced expedition crew, Captain Mortimer will get greater than he bargained for when his ship is frozen into the ice sheet and set upon by bloodthirsty fish-creatures. Mortimer and his surviving crew flee the ship, starting a treacherous journey to search out security in a frozen desolate wilderness. Affected by hunger, frostbite and a gradual insanity, they discover shelter inside a snowy mountain, however are they as protected as they suppose, or have they entered the guts of the creatures lair?