Visitors are arriving in droves to spend Thanksgiving in the mountains of pet-friendly Wagtail, Virginia. Many of them are bringing dog and cat gingerbread houses to enter in the contest that will be held in the new convention center. Wagtail resident Orly Biffle bequeathed the land to the town in his will, provided that they not cut down the grand old oak tree on the property. Orly's children are mighty miffed that they didn't inherit the prime piece of property overlooking the lake.
Holly notices that Trixie and Twinkletoes, her calico kitty, are fixated on the big oak tree. Trixie barks at it as though she thinks it's a corpse! Just as contestants are spicing up their sweet gingerbread creations, the majestic tree drops an enormous limb. The mayor declares that the tree is dangerous and must come down. When a bulldozer churns up some roots, the tree falls over on its own accord revealing a body inside the trunk! Initially, everyone suspects this unsavory trick was Orly's doing. But it soon becomes clear that someone is trying to keep the truth under wraps. Trixie and Twinkletoes now have to help Holly sniff out some suspects and leash a conniving killer.
This is a fun episode in the life of Wagtail with Trixie (the corpse finding dog!) giving hints and tips at regular intervals during the telling of the tale. This time we have a new convention centre about to be opened, just in time for Thanksgiving and a pre-Christmas Gingerbread House contest, however the man who gifted the land gave a stipulation that a certain tree must never be felled or the land reverts to his heirs. The only problem is the tree is rotten and limbs are falling off so felling it is the only choice - before this can happen though the tree falls of its own accord, revealing a pair of shoes and a LOT of concrete!
Now Holly and Officer Dave (along with Trixie and Twinkletoes the cat) need to find out who was inside the tree, but it seems someone is determined to stop them and before long there is another death, along with with attacks and attempted poisonings, so Trixie needs to sniff out the killer before they come for Holly, her Mum or her Oma!