Rosemary and Laura are working on restoring the gardens in an estate that has seen better days, but is being brought back to life by a musician and his wife. When the skeleton of a horse is dug up, the theory is that it belongs to a missing race horse (Arabica). When someone is shot and killed at the house, and a woman's skeleton turns up buried on the grounds, gardening takes a back seat to detecting as Rosemary and Laura piece together clues they have dug up.