Dhayanandam is a rich man who takes care of his wife Ponni, they have no children. Dr. Saravanan was the close friend of Dhayanandam, he tells about his blood cancer and he dies in 20 days. All Dhayanandam's assets are going in vain. Dr. Saravanan gives an idea, to call all his relations and they have come. Unfortunately, they are murdered one by one in the night.
V. S. Raghavan as Jambulingam (Dhayanandam's younger brother / blind man)
Sadhan as Kalyam (Aravindan's younger brother)
Kottappuli Jayaraman as Joseph (Dhayanandam's house servant)
Maali alias Mahalingam (Mohanambal's son)
S.N.Lakshmi as Vadivambal (Dhayanandam's sister)
C. V. V. Banthulu as Somanathan
Kalpana as Anu Radha (Neelamegham's daughter)
S. R. Janaki as Mohanambal (Dhayanandam's sister in law)
Ramanujam as Mottaiyan
Saroja as Pankajam (Mottaiyan's daughter)
Production
After the success of Bommai (1964), S. Balachander launched a film named Nadu Iravil the same year. It was based on the 1939 novel And Then There Were None, by the British writer Agatha Christie.[3][4] Unlike the novel, it features the characters in an urban house rather than being stranded on an island.[5]
Soundtrack
The soundtrack was composed by S. Balachander, while the lyrics for the songs were written by Ve. Laxmanan.[6]
Though Balachander completed the film in 1964–1965, no distributor was willing to buy it, prompting him to distribute the film himself. Nadu Iravil was eventually released in 1970 and became a major success, prompting several distributors who earlier rejected the film, to return and beg Balachander for distributing it.[3]The Indian Express wrote, "The movie succeeds as a very good entertainer entirely due to the directorial work of S. Balachander and Reddi's camera".[7]