Gumnaam

Gumnaam translation Unknown or Anonymous is a 1965 Indian suspense thriller film directed by Raja Nawathe, starring Manoj Kumar, Nanda, Pran, Helen and Mehmood. The film is an adaptation of the book And then there were none by Agatha Christie. The film became a box office hit. The music for the film was composed by ShankarJaikishan.

After murdering a rich man named Sohanlal and covering it up as a car accident, a man named Khanna, who ordered the hit, is murdered as well, by someone he is shocked to see. It is revealed that Sohanlals murder was actually a conspiracy of many people, also unknown. Before dying, Khanna has told the news of Sohanlals death to his niece Asha. Some days later, seven people, including Asha, win a trip to an island in a chartered plane, courtesy a lucky draw in a gala. The others winners are one Barrister Rakesh, one Dharamdas, one Kishan, one Dr. Acharya, one Madhusudan Sharma and one Kitty Kelly. The seven people go to the island, with one Anand, who happens to be a crew member in the chartered plane.Suddenly, the plane develops a snag, causing it to cause an emergency landing. Along with Anand, all the winners leave the plane, along with their personal belongings. However, everyone is amazed when the plane suddenly starts and the pilot flies away, stranding them on the island. Unable to understand what is happening, everybody tries to scout the place unsuccessfully. Suddenly, a woman starts singing an ominous song. Partly trying to find the woman and partly trying to find the place where they were supposed to stay, they finally reach their destination, where they meet the butler. Later on the dinner table, Dharamdas spots a diary, which seems innocuous to him, but Anands facial expressions grow serious on reading the diarys contents. ........

Source: Wikipedia