Twenty-two people from across the UK descend on a Scottish castle in a bid to win up to £120,000, some to be assigned by host Claudia Winkleman as Traitors, while the majority are Faithful. Suspicions, secrets and lies echo around the castle, as under the cover of darkness, the Traitors must pick off the residual players one by one, eliminating them from the game. The Faithful must try to work out who the Traitors are in their midst, banishing them from the game before becoming their next victim. Those who make it to the final have a chance of winning the life-changing cash prize.