Returning home after an extended holiday, Agatha finds a new woman ensconced in the affections of her attractive neighbour James Lacey. The beautiful newcomer, Mary Fortune, is superior to Agatha in every way, especially when it comes to gardening. So with Carsely Garden Open Day fast approaching, Agatha longs for some fascinating crime to occur to remind James of her genius for investigation and to distract him from the fragrant Mary. And sure enough, a series of destructive assaults on the finest gardens is followed by a truly startling murder when Mary herself is discovered buried upside down in a terracotta pot. Agatha seizes the moment and immediately starts yanking up village secrets by their roots and digging the dirt on the hapless victim. But alas, she has an awkward secret of her own.