A teen girl unravels the mysteries of a secret society and their most dangerous invention in this adventure-swept romance set in Victorian London. When a fire consumes Meg's home, killing her parents and destroying both her fortune and her future, all she has left is the tarnished pocket watch she rescued from the ashes. But this is no ordinary timepiece. The clock turns out to be a mechanical key--a key that only Meg can use--that unlocks...