Bilbo Baggins, a respectable, well-to-do hobbit, lives comfortably in his hobbit-hole until the day the wandering wizard Gandalf chooses him to take part in an adventure from which he may never return.

When paleontologist Kate Lloyd travels to an isolated outpost in Antarctica for the expedition of a lifetime, she joins an international team that unearths a remarkable discovery. Their elation quickly turns to fear as they realize that their experiment has freed a mysterious being from its frozen prison. Paranoia spreads like an epidemic as a creature that can mimic anything it touches will pit human against human as it tries to survive and flourish...