The orbital solar mirror vital to the terraforming of planet Komarr has been shattered by a ship hurtling off course, and the Emperor of Barrayar has sent Miles Vorkosigan to find out why. The choice of Miles is not a popular one on Komarr, where a betrayal a generation before drenched the name of Vorkosigan in blood. Amidst lies and treachery, Miles is caught in a race against time to stop a plot that could exile him from Barrayar forever. His hope lies in an unexpected ally, one with wounds as deep and honor as beleaguered as his own.