The Dig tells the story of a hand-picked team who are set to an asteroid, which is headed for Earth. From the beginning, the intelligence of the writers is displayed by the use of nuclear charges to push the asteroid from its path.
The team quickly discovers that this asteroid is more then they believed as they gradually uncover the compnents that lead to its activation. The team finds themself thrown through space aboard the Crystal Starship hidden within the asteroid, only to peacefully land on the surface of an alien world. They are then left with no option but to use what little they have to attempt to unravel the mysteries of this desolate set of islands and find a way home.