Because they have been in a rut of mindless faith, they decide to expand their views on God, the world, and eternity by traveling by car around the United States and Canada for the summer.
They depart from Texas and head west until they reach California, after stopping at The Grand Canyon and Las Vegas.
On their journey through northern America, they pass through Glacier National Park, Yellowstone, Chicago, and Toronto.
Along the way, they meet all kinds of people including beach bums, hippies, suburbanites, a clown, and a congresswoman, who each give them a unique perspective of eternal things.
As they come to the end of their journey, they conclude by stating that the most important thing they learned from the experience is to "never stop asking questions."