Ek Paheli is a 1971 Hindi thriller film starring Sanjeev Kumar, Tanuja, Feroz Khan, Madan Puri and Aruna Irani. Dr Sudhir returns to India from the UK to take care of his family business after his father's death. He buys an old piano after which strange things start happening. He meets a ghost called Maria, who asks him to not let anyone else play the piano. Those who go against this advice start turning up dead. The mystery deepens as he finds out who Maria is.