The novel opens at a shooting party hosted by the unbearable Basil, Lord Fortescue and attended by Emily's oldest friend Ivy Brandon, Ivy's husband Robert (Lord Fortescue's political protege), Emily's fiance Colin Hargraves, and Colin's former lover Kristiana von Lange. Because this is a mystery, we need a dead body and Lord Fortescue complies, shortly after a public argument with Robert. As Emily tries to clear her friend's name, Colin tries to stop an anarchist plot that would start WWI 15 years earlier. Both plots lead to Vienna, where Emily (with the help of French grand dame Cecile du Lac and childhood friend Jeremy Sheffield) and Colin (with the help of Kirstiana) piece together the parallel mysteries.
Colin's mystery wasn't as interesting or as tightly written as Emily's, and its main purpose was to provide a few key pieces of information Emily needed to clear Robert's name. They mysteries, though, are really just a background for the fun. Emily experiences Vienna cafe society, Cecile has an understated affair (one of many) with the artist who is painting her portrait, Jeremy plays the useless aristocrat while nursing a crush, and Emily's mother Catherine, Lady Bromley blows in at hurricane force, bragging about finding Prince Eddy a bride and arranging for Emily to marry in the Queen's presence. A slightly better than average mystery folded into a meringue of a smart historical romance.