At this year's chocolate festival, Darcy and her aunt Abby hopes to win the $10,000 prize in the chocolate contest with Aunt Abby's taste sensation: the chocolate raspberry whoopie pie. A little friendly competition from Darcy's sometimes beau, Jake Miller, who plans to enter with his mocha cream puff delight, only sweetens the deal. But things get sticky when Polly Montgomery, one of the judges, is taken out of commission - permanently. The suspects include every contestant with reason to believe Polly wasn't too sweet on their sweets, including Aunt Abby's high school friend. Now Darcy must pick through an assortment of secrets to catch a killer before someone else gets a bittersweet finish.