Matilda Case isn't like most folks. In fact, she's unique in the world, the crowning achievement of her father's experiments - a girl pieced together from bits. Or so she believes. That is, until Abraham Seventh shows up at her door, stitched with life thread just like her and insisting that enemies are coming to kill them all. Tilly is one of thirteen incredible creations known as the galvanized, stitched together beings who are immortal and unfathomably strong.

Matilda Case isn't normal. Normal people aren't stitched together, inhumanly strong, and ageless, as she and the other galvanized are. Normal people's bodies don't hold the secret to immortality -something the powerful Houses will kill to possess. And normal people don't know that they're going to die in a few days.