Long believed extinct, a superb specimenof draco nobilis ("noble dragon") has appeared in Discworld's greatest city. Not only does this unwelcome visitor have a nasty habit of charbroiling everything in its path, in rather short order it is crowned King.

Meanwhile, back at Unseen University, an ancient and long-forgotten volume--The Summoning Dragons--is missing from the Library's shelves. To the rescue come Captain Vimes, Constable Carrot, and the rest of the Night Watch who, along with other brave citizens, risk everything, including a good roasting, to dethrone the flying monarchand restore order to Ankh-Morpork(before it's burned to a crisp).