When Freddie Dumay (Cynthia Gibb) holds a glamorous party at her family's vineyards to announce the release of a fabulous new Merlot, everything is going wonderfully. Until that is, her business partner's wife, Constance (Catherine Barroll), is found dead - apparently having accidently stumbled while taking some fresh air into a rocky pond. But when Constance's distraught husband, Thomas Shipman (Tom Butler), quickly sets up home with his mysterious French Assistant Arabella (Alexandra Kamp), Freddie realises that Constance's death may not be as innocent as first thought. And when she enlists the help of her brother to undertake some detailed research, the discoveries are simply shocking - as long a Arabella maintains Thomas's trust, it seems that everything Freddie has fought hard to accomplish risks being torn away. Soon, everything Freddie knows is called into question, even the near sacred trust of her husband Alan. It quickly comes down to a simple choice - solve the mystery, or lose everything.