Seagull Island (1982)

Barbara Carey arrives in Rome to visit her sister, blind pianist Marianne Saunders, only to discover that she has mysteriously vanished. To make matters worse, this is the third instance in recent months of a blind girl's abduction. With the help of British Consulate Martin Foster, Barbara searches for her sister – a search that leads her to the private island of millionaire David Malcom. Is Marianne still alive? Why are blind women being targeted? And what terrible secrets does David keep on his remote island?