When Maggie and Grace take a much needed weekend trip to Grasse, the perfume capital of the world, they find rejuvenation, reconnection...and murder—a murder that may decide the future of the perfume industry in France. When the helpful docent of their perfume tour ends up dead in their rented apartment's swimming pool, Maggie and Grace decide that something definitely smells rotten. When the girl's twin sister begs them to look for the killer, they do—but there's a catch. If they don't find the killer in time, the tourism that the area depends so heavily on will dry up...like a rose petal in direct sunlight. With the clock ticking, Maggie and Grace will have to dig deep to find the culprit behind the murder before the killer decides that the two of them are the real barrier to a good life on the Côte d'Azur.