This is where the dragons went. They lie... not dead, not asleep, but... dormant. And although the space they occupy isn't like normal space, nevertheless they are packed in tightly. They could put you in mind of a can of sardines, if you thought sardines were huge and scaly. And presumably, somewhere, there's a key...
 
Insurrection is in the air in the city of Ankh-Morpork. The Haves and Have-Nots are about to fall out all over again.

Captain Sam Vimes of the city's ramshackle Night Watch is used to this. It's enough to drive a man to drink. Well, to drink more. But this time, something is different - the Have-Nots have found the key to a dormant, lethal weapon that even they don't fully understand, and they're about to unleash a campaign of terror on the city. 

Time for Captain Vimes to sober up.