King Verence invites a family of aristocratic vampires to Lancre's royal naming-day feast, hoping to modernize relations with neighboring Uberwald, but the Magpyrs have trained themselves out of every traditional vampire weakness and mean to take the kingdom by charm rather than force. With Granny Weatherwax mysteriously missing, it falls to Nanny Ogg, the newest witch Agnes Nitt, and a young priest wrestling with his own doubts to keep hospitality from curdling into conquest.
Summary by Loreful, from public sources