Frannie and Larry Shoemaker love taking their grandchildren, Sabet and Joe, camping with them. But at Bluffs State Park, Frannie finds herself worrying more than usual about their safety, and when another young girl disappears from the campground in broad daylight, her fears increase. The fun of a bike ride, a flea market, marshmallow guns, and a storyteller is quickly overshadowed. Accusations against Larry and her add to the cloud over their heads. Frannie begins to puzzle out the mystery: Are the itinerant road workers as much of a threat as Frannie thinks? What about the lone woman camper who also disappears? Or is the girl's deadbeat dad behind it all?