Death is missing - presumed . er . gone.
Which leads to the kind of chaos you always get when an important public service is withdrawn.
Ghosts and poltergeists fill up the Discworld. Dead Rights activist Reg Shoe - 'You Don't Have to Take This Lying Down' - suddenly has more work than he had ever dreamed of. And newly deceased wizard Windle Poons wakes up in his coffin to find that he has come back as a corpse.
Meanwhile, on a little farm far, far away, a tall, dark stranger is turning out to be really good with a scythe. There's a harvest to be got in. And a different battle to be fought.