MISSING. That's what the posters say about the girl. But this isn't just another missing kid - not for ten-year-old Calvin Crane. After he bumps into a strange guy at Yellowstone National Park who's secretly removing the posters, Calvin thinks their van is being tailed. Getting murdered isn't exactly on the family itinerary. In a cramped van full of farts and frito feet with his whiny older sisters, parents and crabby Grandma Edith, Calvin presses forward on a cross-country road trip to California to attend the wedding of a family friend. But as the search for the missing girl widens...