Dona, the reckless Lady of St. Colum, in a fit of disgust for the social life she leads in London, goes to Navron, a secluded estate on the coast of Cornwall owned by her husband. There, she discovers that their home has become a secret hideout for a French pirate terrorizing the entire district. However, the meeting with him changes Lady St. Colum's ideas about sea robbers. Instead of a bloodthirsty thug with a team of inveterate scoundrels in front of her is an ironic, bold, educated and very charming person - the one she has been waiting for all her life. A romantic love story is combined with an exciting adventure plot against the background of the mysterious landscapes of Cornwall of past times. The novel “French Stream” was published in 1941 and three years later was filmed. The title role was played by Joan Fontaine, the famous performer of the role of Rebecca, another heroine of Daphne Dumorier, in the film of the same name by Alfred Hitchcock.