In the early twentieth century in the Swampsea, seventeen-year-old Briony, who can see spirits that haunt the marshes around their town, feels responsible for her twin sister's horrible injury until a young man enters their lives and exposes secrets that even Briony does not know about.

"The Robber Girl has a good dagger. Its voice in her head is as sharp as its two edges that taper down to a point. Today, the Robber Girl and her dagger will ride with Gentleman Jack into the Indigo Heart to claim the gold that's rightfully his. But instead of gold, the Robber Girl finds a dollhouse cottage with doorknobs the size of apple seeds. She finds two dolls who give her three tasks, even though she knows that three is too many tasks. The...