Sam Vimes… Ah, pardon—Your Grace the Duke of Ankh, Commander of the City Watch, Sir Samuel Vimes is back on the job.
Chasing the most dangerous criminal, the commander travels through time and ends up in Ankh-Morpork… in the past. Back in the good old days when the city is surrounded by fear, curfew gathers its terrible harvest, the Unnamed run amok, and everything is controlled by a dangerous madman… Earlier today, Sam Vimes had everything. He was noble, rich, respected, he had a small silver case for cigars—and he was planning to become a father. And now he has only one goal. He must track down the criminal he came after in the past. He must unite the Watch into a force that can withstand the hours of universal madness. He must get home.