When a package arrived in the mail at Wayne Greavette's home, it seemed like an early gift for the holidays. Inside was a wrapped present and a typewritten letter addressed to him, with the postscript: "Have a very Merry Christmas and may you never have to buy another flashlight." When Wayne turned the flashlight on, it exploded, killing him instantly. Over 20 years later, the case remains unsolved, leaving Wayne's widow and children consumed with finding the culprit. Along with SKS host David Ridgen, the Greavette family investigates.