When Darcy runs off on another secret assignment, Lady Georgiana is left to figure out how to travel to Italy sans maid and chaperone to help her dear friend Belinda, as she awaits the birth of her baby alone. What luck-- her cousin the queen is in need of a spy to attend a house party in the Italian lake country! The Prince of Wales and the dreadful Mrs. Simpson have been invited, and Her Majesty is anxious to thwart a possible secret wedding. But Mummy is attending the villa party and she has her own secret task for Georgiana. Then, Darcy shows up saying that the fate of a world on the brink of war could very well depend on what she overhears at dinner!