A shadow hangs over the world. Desa Kincaid and her friends must embark on one last, desperate journey to stop a threat from the edge of reality itself. A creature of the void.

Tommy's revolution makes a brave last stand against the forces of imperialism, and armies clash with the power of Field Binding. Meanwhile, hidden within the Eradian capital, Adele - the Weaver - spins the final threads of her plan.

To stop her, Desa will have a crucial choice to make: the Path of Vengeance, or the Path of Mercy.