The setting is Kibou-daini, a largely Japanese world where the inhabitants tend to freeze the dead and dying n the hope that they can eventually be revived when advances in medicine allow for their potential cure. Bujold has put some thought into the economics and political culture of how such a society might operate (if you're not definitely dead, what happens to your assets? to your vote?) and untangling the ramifications of how it might go wrong accounts for the majority of the plot. Myles Vorkosigan arrives in this situation because of a potential threat to the interests of the Barrayaran Empire, though rapidly gets involved in the local politics; the viewpoint characters are Myles himself, his bodyguard Armsman Roic, and a local boy whose mother turns out to be central to the plot (ie both the story and the conspiracy). As usual the story is witty and well-paced; it's also, at 350 pages, relatively short (Mirror Dance was over 440).
And there's a sharp twist at the end, but enough about that. An excellent read, and a welcome return to the Vorkosigan universe.