Wren Graveyard is a bonesmith apprentice who, after failing her qualifying trial, is relegated to guarding the Border Wall against the restless dead. When a prince is kidnapped and taken into the perilous Deadlands, Wren ventures into the forbidden wasteland to rescue him and prove her worth. To survive the journey, she must form an uneasy alliance with an iron-wielder from a rival house while navigating a landscape filled with ghosts and dark magic.