London, 1863. Bridie Devine, the finest female detective of her age, is taking on her toughest case yet. Reeling from her last job and with her reputation in tatters, a remarkable puzzle has come her way. Christabel Berwick has been kidnapped. But Christabel is no ordinary child. She is not supposed to exist.An enchanting Victorian detective novel that explores what it is to be human in inhumane times.