Katherine Morrissey, a former Christian missionary, lost her faith after the tragic deaths of her family. Now she applies her expertise to debunking religious phenomena. When a series of biblical plagues overrun a small town, Katherine arrives to prove that a supernatural force is not behind the occurrences, but soon finds that science cannot explain what is happening. Instead, she must regain her faith to combat the evil that waits in a Louisiana swamp.

On a hot summer afternoon in the sleepy town of Blackwater Louisiana, a meteor streaks across the sky and crashes through the roof of the local Natural History Museum. The meteor is actually a spaceship containing an alien life form which animates the museum's partially frozen Woolly Mammoth and begins a rampage. Local authorities and Government Investigators join forces with Frank Abernathy, the Museum Curator, and his father Simon, a B-Movie enthusiast, to bring down the giant mammoth in this alien-invasion flick!