Another conspiracy is brewing in Ankh-Morpork. The head of one of the secret societies has devised a cunning plan: with the help of a magical book, summon a controllable Dragon, scare the local citizens with it, and when panic begins in the city, call for help from the last rightful heir to the throne, who will destroy the Dragon and ascend the throne.
All in all, the idea was not bad. Only the conspirators failed to take one detail into account. Summoning the Dragon turned out to be not nearly as difficult as getting rid of it afterward. And now the palace and the treasures are in the clawed grasp of the beast-lizard, while any attempt to rise against it ends with the brave souls being burned on the spot.