Half a year after the events of Heart of Dust, Doran Ó Seanáin now finds himself trapped between two worlds while belonging to neither: held in contempt by the Bronze for the turmoil he caused during Archon Bryson's reign, and resented by the miners for selling out. Leonora Darkwater's pursuit to own the mines may be the answer to all of his problems, but the offer is far more complicated than it appears, and the only person Doran trusts is the same man who threw his life into chaos.
Haunted by his past, hostage to a debt that cannot be repaid, and a slave to the poison that keeps him alive, atonement has never felt further out of reach for Nathaniel Morgenstern. Though the damage between him and Doran is too devastating to begin to mend, they have no choice but to face each other as their lives collide once more.
There is a rot in Iole City. The mines aren't finished with Doran, and the sand in Nathaniel's hourglass is running out.