A vital solar mirror, essential for the terraforming of the conquered planet Komarr, has been shattered, threatening the planet's future and Miles Vorkosigan's mission. The Emperor of Barrayar dispatches his imperial auditor, Lord Miles Vorkosigan, to investigate the incident, a task fraught with peril due to a past betrayal that stained the Vorkosigan name in blood on Komarr. Miles must navigate a landscape of potential enemies—loyal subjects, rebels, or victims seeking revenge—while uncovering a conspiracy that could lead to his permanent exile from Barrayar. His only hope may lie with an unexpected ally who shares his own deep wounds and beleaguered honor.

The novel is celebrated for its intricate plot, blending political maneuvering with high-stakes action, a hallmark of Lois McMaster Bujold's Vorkosigan Saga. Readers often praise the complex character development, particularly Miles's ability to navigate treacherous social and political landscapes while grappling with personal challenges. The book is noted for its exploration of themes such as betrayal, redemption, and the consequences of past actions on present relationships. Its compelling narrative and well-realized world-building contribute to its standing as a significant entry in the science fiction genre.