Maggy Thorsen's evening with her fiancé Sheriff Jake Pavlik and his parents in Chicago takes a dramatic turn when Jake's mother falls ill, then a Chihuahua jumps in front of Maggy's car on her drive back to Uncommon Grounds, her Wisconsin coffeehouse. Attempting to return Mocha to her owners, George and Marian Satterwite, the following day, Maggy comes face-to-face with Arial, their dog-sitter and her business partner Sarah's niece. But something doesn't feel right . . .

Returning to the property, Maggy and Marian make a shocking discovery. And where are George and Arial? With Jake still in Chicago and Sarah desperate to find her niece, Maggy is soon drawn into another deadly puzzle.