A real-life Hardy Boys mystery. More than most of our shows, this one lends itself to a Hollywood-style tagline. Perhaps: "The House at Loon Lake: You Might Break In ... But You'll Never Forget." Or, "The House at Loon Lake: Dead Letters Tell No Tales." It's the true story of an abandoned house, discovered by a young boy in the 1970s, and the mystery of why it was abandoned.