Rosemary and Laura are called to Paris by Rosemary's old friend Dorothy, to catalog the plants in the 150 year-old gardens at her Riviera Villa (Villa Galavany) in order for them to be opened to the public.

The duo realize they will face problems when one of Dorothy's neighbors called James Pretty makes it known he feels strongly against hordes of visitors coming to the area.

Things get more hostile when Dorothy's husband Kasper is found dead, and one of her valuable pieces of silver is stolen...