Twin brothers Rob and Mark are helping their scientist mother with her institute's muskox-observing mission. No one can figure out why no muskox can be found - until Rob and Mark get some strange information that leads them to a mysteriously etched human bone and an old Inuit man who seems to have appeared from nowhere to entrance them with eerie folk legends. Then the brothers find themselves suddenly speaking fluent Inuktitut and having nightmare visions...