 Roy & Candy and Lonnie Earl & Darlene are two married couples who thought they knew one another, until they decided to take their dream vacation together. Hitting the road in a brand-new SUV, they re having the time of their lives until something funny happens on the way to the Monster Truck Show in Reno. Turns out Lonnie Earl has a thing for Candy, and when evidence of this starts to surface, things really start to heat up.