Mayfair, 1905. The grandest house on Park Lane has just dismissed its housekeeper. All manner of treasures lie behind the pillared doors – and scandalous secrets too. With the event of the season looming, nothing must go wrong. But what no one knows is that Mrs King will be back at Park Lane on the night of the ball. She has an audacious plan in mind – and knows just who to recruit to help her clean up.