Early in the next century, outside a North Dakota town, farmer Tom Lasker digs up a boat on his land. Not only is the vessel crafted from an unknown element, but Lasker's farm is on land that has been dry for 10,000 years.

A search for further artifacts unearths a building of the same material and age that turns out to be an interdimensional transportation device. The building sits on land owned by the Sioux, who want to use it to regain their old way of life on another world; meanwhile, the U.S. government, fearful of change, wants to destroy the building.