Six lifelong friends from a small Illinois town spend every Monday night country line dancing together. In between the songs, they grumble about jobs, men, and the growing dissatisfaction with getting older. One January evening, the complaining reaches an all-time high. Teresa, ringleader of their little circus, experiences a light bulb moment and suggests they book a summer bus tour to jazz up their humdrum lives and celebrate the first of them turning fifty. Fast forward to June, and they've arrived in Las Vegas ready for nine days of fun and adventure out west. Surprise number 1: Their fellow travelers are all at least twenty years older than they are. Surprise number 2: The tour director is a hunka hunka burning love who has quite a way with the ladies. Surprise number 3: One of those ladies decides he must die. Join the National Parks Wonders Tour and meet Teresa, Jackie, Crystal, Annette, Kim, and Donna as they share the vacation of a lifetime, laughter and tears, and one big secret they'll take to their graves.