The Russell family thinks they've found their dream home, but before long, a string of troubling events makes them reconsider. Eerie sounds, broken household items, and murdered pets clue the family in to the fact that something is seriously wrong in their new abode. At first, the Russells think that these things may have something to do with their imaginative young daughter, Gina. But when a race of ancient monsters is discovered beneath their house, they start to think about trying to escape with their lives.