The Cinco de Mayo Open House at Kats Jory Hills Estate Winery is the preview to the colossal Memorial Day Weekend celebration in Oregon wine country. Having just opened her new B&B, Kate Ferguson, who wears a second hat as director of Cats Pause Feline Shelter, excitedly anticipated the event. That is, until the death of horse trainer and friend, Donald Jenkins cast a pall over the upcoming holiday. When friend (and more) Officer Charles Beltz is assigned to the case, Kate and Commissioner George King vow to help him flush out the culprit. Meanwhile, Mo and her feline friends lead the humans in the town of Seven Oaks in hot pursuit of the killer.