Amory Ames is looking forward to a tranquil period of reconnecting with reformed playboy husband Milo after an unexpected reconciliation following the murderous events at the Brightwell Hotel. However, she is drawn into another investigation when Serena Barrington asks her to look into the disappearance of valuable jewelry snatched at a dinner party. Amory agrees to help lay a trap to catch the culprit at a lavish masked ball hosted by the notorious Viscount Dunmore. But when one of the illustrious party guests is murdered, she is pulled back into the world of detection. Rumors swirl about Milo and a French film star. Once again, Amory and Milo must work together to solve a mystery set in the heart of 1930s society London.