Amy Thomsett - the girl who flies on moth-wings - takes part in the Great Game, a contest of skill against other institutes of learning. In a nightmare, and in the cellars of a house in Piccadilly, Amy glimpses a spectre who might have dogged her all her life, the Broken Doll. The cracked-face, glass-eyed creature might well be the most serious threat the Moth Club have ever faced.