One summer, while exploring the town during their annual stay at Grandma's house, two siblings and their cousin come across a creepy old house. The kids poke around, one of them causing mischief and tossing rocks at the window, until they glimpse a ghost through the glass Later, Grandma reveals the house doesn't belong to a ghost--just old Mr. Peterson. After visiting again with better intentions, the kids discover Mr. Peterson's great sense...