In the desert city of Yontar, Nya cares for her sick mother. But when Nya is arrested, her mother's death is all but certain unless Nya joins a secret project that promises her freedom. If she survives.

Rai, a mercenary, has a shadow dark enough for two. In his quest to discover the nature of the creature living in his shadow, Rai collides with old friends and new enemies, stumbling into an ancient mystery that could mean the end of the world as they know it.

All the while, a darkness stirs and rebellion threatens, helmed by a man who promises justice will reign.