In a time of rapid technological change which challenges the roots of the empire, Elizabeth witnesses the impossible. The arrival of her late husband's doppelganger takes Elizabeth Hunter-Payne to the brink of insanity.

Captain Nathanial Royston, late of the disgraced East India Company, claims he is innocent of the murder on the Great Northern Express.

With the coolly professional Miss Clayton at her side, our feisty heroine investigates three nasty suspects to get to the bottom of the mystery. While doing so, Elizabeth is faced with a cruel reality and comes to a decision that threatens her future happiness.

Another thrilling steampunk adventure with steam trains, miniature automatons, as well as guns, knives, and a handy half-brick in the reticule.