A hundred years ago, eleven powerful Houses claimed control of Earth's resources, taking hold of everything from water, to air, to people's freedom. They captured the twelve galvanized—indestructible, stitched together humans—and forced them to serve.

Matilda Case is the rebel leader of House Brown, an underground organization that helps keep people hidden and free from the powerful Houses. The job suits her fine, since she has her own secrets that need keeping. See, Matilda's a near-impossible thing—a new galvanized—brought to life by her brilliant inventor brother who's been missing for a few years now.

When a powerful House sends their galvanized, Abraham Seventh, to find Matilda, her secret is out. The Houses know she is a new galvanized and will stop at nothing to capture her, even if that means killing her ragtag group of friends and family.

But that's not her only problem. She's being hunted by an enemy who believes she holds the key to time itself, a key so powerful, it could destroy the world.

Matilda's enemies are clever, they are brutal, and they're coming for her.