The week leading up to Christmas should be fun, but when mobile-veterinarians Dr. Emily Harrison and Dr. Maggie Post encounter an angry arachnid as big as a small dog, they decide it's no fun at all - especially as the eight-legged creepy-crawly is found guarding a dead body.

Who hated the bullying agent enough to kill her? Her boss, Edward G. Peters, the best-selling horror author whose modus operandi in his latest book is identical to the crime? Or the author's cook who is protecting a shady secret between her boss and the deceased? Or the edgy young cleaner who's living a lie, the TV guy with a hidden agenda, or the scruffy burglar caught breaking into Emu Lodge the day before the murder?

Once again, the two amateur sleuths find themselves deep in the middle of another baffling mystery. However, when Maggie's daughter gets caught up in the killer's sights and Fat Santa threatens to blow them away if they don't butt out, both Maggie and Emily wonder if maybe the stakes are too high.

That is, until Maggie wakes to find herself surrounded by spiders…