First, when Beth and Steve Clapper bought this 24,000-square-foot craftsman in McCloud, Calif., the building was so massive that there were rooms the couple hadn't even gotten to see yet. Little did they know there was a mystery behind these closed doors just waiting to be solved. Next, an unassuming trunk reveals a secret affair in the 140-year-old family vacation home of Laura Rydin in Kennebunk, Maine. Then, when a chunk of wallpaper falls from the ceiling of Sharon and Brian Snyder's home in Independence, Mo., they fear their house may have once been the scene of a brutal crime. Finally, Joyce McNeely may have inherited this 1836 farmhouse in Burlington, Ky., but she moved into a mystery.