Lady Montfort is thrilled to receive an invitation to a dinner party hosted by her close friend, Hermione Kingsley, the patroness of England's largest charity. Hermione has pulled together a select gathering to celebrate Winston Churchill's 39th birthday. But when the dinner ends, one of the gentlemen remains seated at the table with a knife between his ribs. Determined to get to the bottom of things, Lady Montfort and Mrs. Jackson unravel the web of secrecy surrounding the bright whirlwind of London society, investigating the rich, well-connected and seeming do-gooders in a race against time to stop the murderer from striking again.