she tells him about the cowardly Muthu and that she left him. The reason being that after ill-treating her, he took her to a party. There his friend Balu tried to rape her and threatened to shoot anyone trying to stop him. Muthu fled for his life, forcing Devaki to knock Balu out with a vase. After hearing this, Raman offers to take care of her which she refuses. Balu again tries to rape Devaki, who kills him this time. Devaki runs to Raman and gives him her baby daughter Sumathi to take care of her while she surrenders to the police. Using his influence, Raman helps Devaki receive a reduced sentence of five years. Meanwhile Raman brings up and educates Sumathi. Having squandered his wealth, Muthu becomes the school bus driver of Sumathi and Sumathi realises he is missing his wife. She meets his wife (her mother) at jail coincidentally. Raman is with Sumathi during this meeting but Devaki stops him from speaking. Completing her jail sentence, Devaki becomes a teacher in a small school letting Raman know of her whereabouts. Time moves on as Sumathi goes to college, being brought up as a well mannered girl by Raman. She then falls in love with Gopi. Raman agrees to their marriage. He informs Devaki and requests her presence. When he brings Devaki home, Sumathi is absent as she has gone to a party. Raman rushes to the party and finds an attempt to rape Sumathi taking place. He fights the rapist but an attack by the rapist triggers a seizure, due to which Raman loses control and accidentally kills him. Sumathi saves Raman and brings him home by taxi. But Raman calls the police to surrender. He also reunites Muthu, who drove the taxi, with his family. Cast Sivaji Ganesan as "Saappattu" Raman / Vijayakumar K. R. Vijaya as Devaki Muthuraman as Muthu M. N. Nambiar as Minor Rajarathnam S. V. Ramadas as Balu Sudhir as Gopi Master Prabhakaran as young Gopi S. N. Lakshmi as Raman's grandmother M. Bhanumathi as Sumathi Baby Rani as young Sumathi Goundamani as the bus driver (uncredited) Production Raman Ethanai Ramanadi was produced and directed by P. Madhavan under the Arun Prasad Movies banner, and written by Bala Murugan. Cinematography was handled by P. N. Sundaram, and editing by R. Devarajan. The film's title was derived from the song from Lakshmi Kalyanam (1968).