Nine-year-old Tiffany Aching thinks her Granny Aching - a wise shepherd - might have been a witch, but now Granny Aching is dead and it's up to Tiffany to work it all out when strange things begin happening: a fairy-tale monster in the stream and the tiny blue men in kilts, the Wee Free Men, who have come looking for the new 'hag'.
Tiffany Aching put one foot wrong, and made one little mistake. And now the spirit of winter is in love with her. He gives her roses and icebergs, says it with avalanches and showers her with snowflakes. And just because the Wintersmith wants to marry you is no excuse for neglecting your chores. So Tiffany must look after Miss Treason.