When Sarah Welles decides to have an affair with Andrew Farrell, she has no idea who her lover really is, or how unforgiving and relentless her husband Michael can be.

After raising five children, Joe Loudermilk, a retired police officer, and his wife, Dottie, decide to have some adventure, so they buy a trailer and hit the road. They get their wish near the Grand Canyon when a dead man turns up in their toilet. While Joe and Dottie are in the clear, they find themselves crisscrossing the Arizona desert in search of the killer, with the FBI, the National Park Service, the L.A. Raiders, and the mob on their heels....