Spade, SMoF (Secret Master of Fandom), forensic accountant, and amateur detective for sf conventions when necessary, is program director of SierraCon, an sf convention held at a relatively isolated hotel in the Sierra Nevada Mountains, just barely on the California side of the California/Nevada state line. Oh, and this convention is in November. He's filling in for the original program director, who is recovering from chemotherapy for cancer, and not able to do the job. He's not fond of either mountains, or snow, but once the convention starts, no one really has to go out, and the locals say the snowstorms are overblown and don't generally create real problems. Getting ready of the official start of the convention, Spade ignores the weather.
That's a mistake. As the official start of the convention approaches, a major blizzard closes in, flights are canceled, both attendees and guests cancel, and Spade has to remind the hotel's general manager of the unusual terms of their contract regarding cancelations. At least their Writer Guest of Honor arrived early, and the "Usual Set," a group of New York-based writers and editors who travel a lot, show up unexpectedly, just before that becomes impossible, and can be used to fill program holes created by the cancelations. Except, of course, Spade's troubles haven't even started. That happens during dinner that night, when one well-known fan nearly chokes to death, is saved by fandom's other traveling detective, Paladin, performing the Heimlich maneuver, and subsequently proves to have been poisoned.