September 1811. Someone is killing the scions of wealthy London families. Mutilated bodies with strange objects in their mouths are found in the busiest places. Law enforcement officials turn for help to Sebastian Saint-Cyr, Viscount Devlin, who has solved more than one mysterious crime. Death follows death, and Sebastian believes that ritual murders lead to an unknown goal. And the key to all this may lie in the mysterious stanzas of the mesmerizing poem. Devlin understands that he must hurry, but the search only leads to more and more mysteries...