In 1889 Evaline Stoker, Mina Holmes, and their time traveler friend, Dylan are asked by the Princess of Wales to find out what happened to Robby Ashton, who may have drowned--but the reappearance of vampires in the heart of London threatens to become a more urgent problem.

Ever since the debacle of the Chess Queen Enigma, Mina Holmes and Evaline Stoker have laid low, trying to settle back into their quiet lives as young ladies of London. But the Holmesian deductive abilities won't remain dormant for long, and when Mina receives a strange package from a winged, midnight visitor, she is catapulted into a new, mysterious adventure: the search for The Carnelian Crow. Meanwhile, Evaline has received some very disturbing...