When barista and coffee connoisseur Leo Martinez finds his crankiest customer dead behind the counter of his beloved coffee shop, Two Beans, he discovers the victim's final cup holds more than just espresso—it contains a clue that points to murder. Suddenly, Leo finds himself brewing up trouble as he turns amateur detective, investigating a colorful cast of regulars who all had reasons to want the victim gone. With the help of his baking best friend and a golden retriever with a nose for clues, Leo must sift through coffee grounds and cryptic messages to find the killer. But in a shop where everyone has secrets brewing, Leo realizes that solving this murder might just cost him more than his business—it might cost him his life.