Claudia Winkleman greets 22 strangers as they arrive at a beautiful castle in the Scottish Highlands to play the ultimate reality game of detection, backstabbing and trust, in the hope of winning up to £120,000.And it's not long before the players are questioning everything, and everyone, as Claudia secretly assigns three traitors. It is up to the traitors, under the cover of darkness, to pick off their fellow players one by one, murdering them from the game.The rest of the players, the faithful, must try to work out who the traitors are and banish them from the game before they become their next victim.The lucky ones who survive to the end will have the chance of winning that life-changing cash. But if a traitor remains undetected, they will take all the money.