After returning home from a cattle drive in the rolling fields of Colorado, twins Spencer and Maggie Parker think they must have been dreaming. The camper that showed up in their driveway on the last day of second grade couldn't possibly be magic. There's no way a camper can transport them to every state in the continental US... or is there? Needing to know if it was all in their head, the twins sneak out to test the camper's abilities,...