In the close-knit town of Auburn, Oregon, Andi Clark's therapy animals bring comfort to the community, especially during the holiday season. As the annual Christmas Craft Bazaar draws near, Andi agrees to set up a Petting Zoo with her beloved animals, bringing smiles to the faces of children and adults alike.

But when a young girl seeks solace from Athena, Andi's therapy dog, after witnessing an unsettling scene behind the sleigh, it marks the beginning of a much darker holiday. As the town gathers for the Tree Lighting Ceremony, a scream shatters the festive atmosphere. Cocoa, Andi's loyal Border Collie, pulls her toward a chilling sight: a woman standing over the lifeless body of the girl's mother, strangled with Christmas lights.

Determined to help the grieving girl and her town recover from the shock, Andi, her therapy animals, and her niece, a county deputy, take it upon themselves to investigate. As they uncover secrets and untangle clues, they stay one step ahead of the new sheriff and worry that the killer lurking in their midst could be someone they know.