It's 1941.To bring the clan together Deborah invites them to Chatsworth for Christmas, along with a selection of society's most glamorous guests, as well as old family friend Louisa Cannon, a private detective. One night, a psychic arrives, and to liven things up Deborah agrees she may host a séance. But entertainment turns to dark mystery as the psychic reveals that a maid was murdered in this very same house.