Emily and Stan Remington's maiden voyage in their newly inherited RV takes a lethal turn when a body falls off the top of their vehicle. The retired couple find themselves at the center of a murder investigation involving a politician, a corporate executive, and a hippie priest. The rookie RVers inevitably butt heads with the local sheriff as their investigation takes them from a backwoods cabin in Wisconsin's scenic Door County to the Bishop's Chancery in Madison to an abandoned island in the infamous Death's Door Straits.