Staf Coppens investigates in a castle in Kerkrade, the Netherlands, whether there is a bad side in each of us. The participants stay there for 8 days, without any contact with the outside world. Three celebrities are designated by Staf as 'traitors'. They murder one of the 'allies' every night. It is up to the allies to unmask and banish the traitors, before it is too late.
