Miss Amity Doncaster, world traveler, is accustomed to adventure and risk. Benedict Stanbridge, a man of science and a spy for the Crown, has faced danger in the darker corners of foreign lands. But they are about to face a threat that is shockingly close to home . . . One does not expect to be kidnapped on a London street in broad daylight. But Amity Doncaster barely escapes with her life after she is trapped in a carriage with a blade-wielding man in a black silk mask who whispers the most vile taunts and threats into her ear. Her quick thinking, and her secret weapon, save her . . . for now.