Brought together by professional and personal heartache, two plucky ladies plant the seeds for a brighter future. Rosemary Boxer, with a doctorate in plant pathology, and Laura Thyme, a former police constable and avid gardener, discover their shared love of green-thumbness and start a gardening business. As they restore various English gardens back to their lavish states, the inquisitive pair also find themselves uncovering an assortment of mysteries.