Knowing who you can trust is the difference between living and dying. Dropped into the frozen wastelands of Antarctica, youre the leader of a military rescue team sent to investigate the mysterious death of an American scientific expedition. In the punishing wind and cold, your team encounters a strange, shape-shifting alien life form that assumes the appearance of the people it kills. As the team leader, you must forget everything you ever learned about obliterating aliens simply with a barrage of violent ammunition–this monster is difficult to see, hard to kill, and seemingly impossible to evade.