In 1953, from their camouflaged tree house, two farm children accidentally witness the visit of an apparent alien spacecraft. The children later discover, and then lose, an extraordinary, small, silver disk inadvertently left behind by the odd nocturnal visitors.

Fifty years later, the daughters of that farm boy, Butzy and Jude, unexpectedly find that silver disk while visiting the dilapidated remains of Papa’s childhood farm. When they manage to activate the “magic disk,” they unwittingly set into motion a dangerous series of events that culminates in a violent showdown during an intense mule ride into the depths of the Grand Canyon.