Journeying from London to America to rescue her kidnapped friend Jasper, Finley turns for help to English duke Griffin King to balance her dark and light magic while a devious bounty hunter threatens the life of the girl Jasper loves.
An ultimate showdown in 1897 London is marked by Mila's pursuit of independence after her heart is broken by Jack Dandy, Griffin King's torture by the Machinist, and Finley's life-risking venture into the Aether.
Sixteen-year-old Finley Jayne and her "straynge band of mysfits" have journeyed from London to America to rescue their friend Jasper, hauled off by bounty hunters. But Jasper is in the clutches of a devious former friend demanding a trade ; the dangerous device Jasper stole from him for the life of the girl Jasper loves. One false move from Jasper and the strange clockwork collar around Mei's neck tightens. And tightens. From the rough streets of lower Manhattan to elegant Fifth Avenue, the motley crew of teens with supernatural abilities is on Jasper's elusive trail. And they're about to discover how far they'll go for friendship.
Finley, who has a beastly alter ego inside of her, joins Duke Griffin's army of misfits to help stop the Machinist, the criminal behind a series of automaton crimes, from carrying out a plan to kill Queen Victoria during the Jubilee.