After years of bullying others as a high-flying public relations boss, Agatha takes early retirement to a picture-perfect village in the Cotswolds. And how better to make friends than by entering the local quiche-making competition? To ensure first prize Agatha buys her entry at a London delicatessen. Alas, Agatha's perfect product is soon exposed - as not only store-bought but poisoned. The contest judge succumbs after eating it, and with him go Agatha's chances of rural bliss - unless she can discover the real poisoner...