The film begins with the old man Thamizharasan (Vishnu Priyan) remembering about his past. In the past, Thamizharasan was an idealist and respectful young man who was fond of literature and he wanted to change society for the better. He left his native place Viluppuram to work as a journalist in Chennai and joined a magazine as a journalist. He was well liked by his colleagues and impressed by his work, his superiors promoted him as an assistant editor. In the meantime, Thamizharasan's family found him a bride: Kayalvizhi (Uma). For his work, Thamizharasan had to write an article about a gang leader turned politician Manikkam who was also Thamizharasan's old friend. Thamizharasan met him and asked him to stop his illegal activities but Manikkam refused. One day, he was arrested for misbehaving with a woman at the bus stand. Kayalvizhi witnessed the whole scene and started to hate Thamizharasan. It was Manikkam's plan to teach him a lesson and Thamizharasan was then released by the police. Despite this, her family arranged her wedding with Thamizharasan. After the marriage, Kayalvizhi realized that Thamizharasan was a perfect gentleman. The couple had a girl and lived happily. During an outing with his family, a riot broke out following the death of a politician. Kayalvizhi was hit by a stone and rushed to the hospital where she entered the coma stage. Thereafter, she was declared brain death by doctors. In a twist of fate, the wife of the person who threw the stone which hit Kayalvizhi was in the hospital awaiting a heart transplant and Thamizharasan agreed to donate his wife's heart. Thamizharasan then raised his daughter Panimalar on his own and she is now a district collector.