Emma . Bannon, . Sorceress . Prime in service to . Queen . Victrix, has a mission: to find the doctor who has created a powerful new weapon. . Her friend, the mentath . Archibald . Clare, is only too happy to help. . It will distract him from pursuing his nemesis, and besides, . Clare is not as young as he used to be. . A spot of . Miss . Bannons excellent hospitality and her diverting company may be just what he needs. Unfortunately, their quarry is a fanatic, and his poisonous discovery is just as dangerous to . Britannia as to . Her enemies. . Now a single man has set . Londinium ablaze, and . Clare finds himself in the middle of distressing excitement, racing against time and theory to find a cure. . Miss . Bannon, of course, has troubles of her own, for the . Queens . Consort . Alberich is ill, and . Her . Majesty unhappy with . Bannons loyal service. . And there is still no reliable way to find a hansom when one needs it most. .