Diplomatic Immunity takes us on a thrilling journey where Lord Miles Vorkosigan is once again called into action. A rich Komarran merchant fleet has been impounded at Graf Station in distant Quaddiespace after a bloody incident involving a security officer from the convoy's Barrayaran military escort.

Though Miles and his wife, Lady Ekaterin, are eager to return home for the births of their first children, duty calls when Barrayar's Emperor Gregor requests Miles' expertise as the youngest Imperial Auditor, a special high-level troubleshooter.

On Graf Station, Miles faces diplomatic snarls, tangled loyalties, old friends, new enemies, racial tensions, lies, and deceptions. There are mysterious disappearances and a lethal secret with consequences wider than Miles anticipates. Time is running out, and the entire system is in danger.

The downside of being a troubleshooter is starkly illustrated when the trouble starts shooting back. With life and death at stake, Miles embarks on a race against time, confronting horrifying new forms of danger.