L. D. Knorr's fourth installment in the RV Mysteries--Hank and Helen Moran’s private investigation business in Kenner, Louisiana is doing so well that their Bounder motorhome has been parked unused in their driveway for months. They decide to travel to Charleston, South Carolina for a much needed break. However during an overnight stay in Thomasville, Georgia they unknowingly pick up an uninvited guest in site #22. Their trip quickly turns into a paranormal adventure involving the realm of the afterlife.