On the first day of summer, Shaggy, Scooby, and their friends in Mystery, Inc., join their friend Fred on a trip to his boyhood camp.  The camp is pretty run down but Jasper, the owner, appreciates all the help he gets from Hank, the handyman.  After setting up the tent, having a meal, and telling scary stories, they relax for the evening.  Later that night a thunderstorm shakes the tent.  Looking out, they see a looming creature.  Racing off to the woods, they hide and wait out the storm.  In the morning, they follow tracks to a cave.  Although warning signs say to stay away, the kids decide to investigate.  With quick detective work, they discover the rocks are painted diamonds and the “wild ape-man” is really Hank.  Jasper is relieved and thankful.  Now he has the money to fix up the old camp.  The cartoon artwork is colorful and illustrations and text are well placed.