Incarcerated in a sanatorium, you must convince the staff that you are sane by telling the story of the terrifying events that led you there. The other players try to disrupt your tale to make themselves look more sane in comparison, and the success of your tale determines which misguided therapies and medication are administered by the terrifying medical staff. These treatments are the way the game is scored, the player ending with the least amount of treatment is the winner, and is free to go.
Each player is trying to persuade the sanatorium staff that they are sane and can be released. As well as giving a convincing account of their own story, players can improve their chances of being freed by casting doubt on the other players’ tales – making themselves seem sane by comparison.