Ethiroli
Shankar, an honest lawyer always helps the poor. He is about to get his sister married when he faces a financial crisis. He comes across a suitcase full of money that can solve his problems.
Starring Sivaji Ganesan, S. S. Rajendran, K R Vijaya, Major Sundarrajan, Nagesh, Sivakumar, Lakshmi, V. S. Raghavan, O. A. K. Thevar, Vijayalalitha
Watch "Ethiroli" on Amazon released in 1970. It's a drama and thriller movie, and has a rating of 7.5 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.