After Gemma Doyle reluctantly helps 10-year-old Lauren Tierney to find her missing cat, the girl returns for a far bigger job: exonerating her mother, who has been accused of murdering her garden club rival. Despite herself, and despite the disapproval of her police detective boyfriend Ryan Ashburton, Gemma finds herself and Jayne Wilson taking on their sixth case (after There's Murder Afoot), setting out to infiltrate the world of competitive gardening.