Margery and her wive Clementine are enjoying a peaceful middle-age together in the small, idyllic town of Dewstow, and eagerly awaiting retirement from their work on the front line serving meals to the students at Summerview secondary school. Their calm life is shattered when their kitchen manager is found dead in the school’s walk-in freezer. The police are adamant that it’s an open-and-shut case of accidental death. Margery and Clementine are convinced there’s something far more nefarious going on, and they take it upon themselves to investigate. As they inch closer to the truth, it becomes clear that someone will stop at nothing to keep the pair quiet. Will the perpetrator get their just-desserts before their time runs out?