Laura and Rosemary are hired to re-create a Victorian garden in Regent's Park, where they meet all manner of intriguing characters - but the oasis of calm in central London is shattered by the discovery of a body. The victim is a respected Harley Street psychiatrist - whose three-legged dog appears to hold the key to solving the case.

The duo visit a resort in Spain to create a trophy garden for a pro-am tennis tournament run by a former champion. When one of the competitors is found dead, everyone assumes it to be a gruesome accident - but there is more to the case than meets the eye. While investigating, Laura enters the mysterious world of bullfighting, and Rosemary rediscovers her love of motor scooters.