Maria Roderich (The Old Lady), Maria Magí (The Mrs) and Maria Costa are three women who, throughout almost a century, have run La Principal, the most important house in the village of Pous, in the heart of the grape-producing region of La Abadia. Those three, grandmother, daughter, have made the vines flourish due to a series of transformations that have kept the business going. But there is a dark secret in the history of La Principal: the murder, on 18th July 1936, of the man who had been their overseer. After the war, a police inspector decides to solve the case and opens an investigation that will lead him to discover the secrets of the family and a web of knotted temperaments, passions and power.