Twenty years ago, Malcolm Whiteley discovers his attractive wife Lysette is having an affair. The Whiteleys are wealthy, and live with their 16 year old daughter Amber in the magnificent Dungeon House. When Lysette tells Malcolm their marriage is over, he snaps, and takes out the old rifle he has been hiding...Back to the present day, and Hannah Scarlett’s cold case team are looking into the disappearance of Lily Elstone, whose father was Malcolm Whiteley’s accountant. Their investigation coincides with the disappearance of another teenage girl, Shona Whiteley, daughter of Malcolm’s nephew Nigel. As Hannah’s team dig down into the past, doubts arise about what exactly happened at the Dungeon House twenty years ago…