When a fringe scientist releases a prehistoric seed, it unleashes a horrific root system that rips through Nevada like an earthquake and devastates everything in its path. Now a hard-nosed government agent (Adrian Pasdar of ''Heroes''), a desperate plant expert (Stefanie von Pfetten of Percy Jackson & The Olympians: The Lightning Thief ) and a pair of young environmentalists must find a way to stop its destructive growth. The military cannot kill it. Shattered chunks regenerate to thousands of feet tall. But is this biblical green behemoth headed for an even more catastrophic life source?