The residents of the town of Pickax in Moose County, "400 miles north of everywhere", are awaiting the "Big One" -- the three-day blizzard that heralds the arrival of winter. They're particularly anxious for it this year, since severe drought has turned the area into a virtual tinderbox. Philanthropist/journalist Jim Qwilleran, companion to the wily feline detectives Koko and Yum-Yum, has joined the volunteer fire patrol for a 24/7 watch on the historic mineshaft towers. When a firewathcher is shot, a sinister plot unfolds in this 23rd entry in Braun's bestselling series.