The newly formed gardening duo 'Rosemary and Thyme' are called to help pop star Nev Connolly design and create the gardens for he and his wife Patsy's new house. Whilst working on the grounds, all are shocked when a digger uncovers the skeleton of a horse, which Patsy suspects could be Arabica, a horse stolen from the stables where she once worked. That night, Rosemary is woken by the sound of a gunshot and hurries outside to find out where it came from. Joined by Laura, they discover that Nev has been shot dead. Returning to work the next day, Rosemary is intrigued by a cut in the ground. Digging around it, she uncovers the skeleton of a human hand...
