The Story of Adele H. (1975)
The Story of Adele H. is a 1975 French historical drama film directed by François Truffaut and starring Isabelle Adjani, Bruce Robinson, and Sylvia Marriott. Written by Truffaut, Jean Gruault, and Suzanne Schiffman, the film is about Adèle Hugo, the daughter of writer Victor Hugo, whose obsessive unrequited love for a military officer leads to her downfall. The story is based on Adèle Hugo's diaries. It was filmed on location in Guernsey, Barbados, and Senegal.
More at Wikipedia.