While on vacation, Harry sees a person commit murder. Harry witnesses the murder in a motor-home while camping with Harrison and family. A camping outing for the Fox family turns into a hunt for a body when Harry claims to have seen a murder being committed aboard a motorhome.The mystery begins when the Foxes lose their way. On seeing the parked motorhome, they pull over to ask for directions. It is then that Harry witnesses the murder. Harry snoops around the motorhome the next morning but is threatened by the owner, Chuck. Shortly after this, a woman who resembles the "murdered" lady emerges. Puzzled, Harry asks the local sheriff to make a search for the body. But nothing turns up....