Someone is killing Lord Vetinari, Patrician of Ankh-Morpork. No one knows who; no one knows why; and, worst of all, no one knows how—he just gets weaker and weaker.
But, it's not just Vetinari. Across the city, people are being murdered, but there's no trace of anything alive having been at the crime scene. Commander Vimes, Head of the City Watch, is a man who hates "clues". He and his team must question everyone—the butcher, the baker, the candlestick maker...
In a city teeming with vampires, werewolves, dwarfs with attitude, and golems, Vimes must solve the crime and save the Patrician.