With Emily Westhill's popular Deputy Donut Café rolling out seasonal summer treats, everyone in Fallingbrook, Wisconsin, wants a taste. But when a limited batch box turns up near a dead body, Emily and her curious tabby are pitted against the worst kind of customer—a cold-blooded murderer!

Emily feels like a protective big sister around bubbly twenty-something Izzy—a new regular whose enthusiasm for peaches-and-cream donuts is surpassed only by her dream to start her own business. As if blown in by an August breeze, Izzy pulls Emily into her plan to buy a property at the edge of town to grow and sell fresh produce. But she's not the only fan of Deputy Donut's peachy delights . . . or the only patron vying to own the lush parcel of land. And the competition is fiercer than the two women imagined . . .

Petty squabbles turn deadly when a developer with a mean streak is found murdered on the vacant stretch of land. Worse, Emily's signature donuts are spotted nearby, leading to several potential suspects who could have left their sugar-frosted fingerprints all over the crime scene—including the mayor, a handsome out-of-towner, and even sweet-to-the-core Izzy. When her detective husband discovers poisonous ingredients in the discarded desserts, a shocked Emily must reveal holes in a collection of very fuzzy facts and nab the killer before someone else takes their last bite . . .