Thangadurai does not talk to his wife assuming that she has cheated him. However, after many years of married life, he gets attracted towards Kanaga, who is after his wealth.
Chinna Durai(V. K. Ramaswamy) dislikes his brother-in-law, Kanagasabi(V. S. Raghavan) stands in the way of a marriage arrangement for his daughter Malathy(Vanisri) and Kanagasabi's son Ravi(Jaishankar). The film deals with how Ravi's resourcefulness helps him in getting Malathi's hand in marriage.
A murder takes place in Neelagiri Express bound to Coimbatore from Chennai.
Nirmala (Padmini) is a poor but talented young dancer who falls in love with a rich man's son Sekar (Gemini Ganesan), but he is forced to marry a rich man's daughter Prathiba (Tambaram Lalitha). Nirmala promises to her lover that she will never dance in public. Due to various circumstances, Sekar's house is up for auction, and in order to save him, she performs in public. With the money thus earned, she saves his house, but Sekar is unaware of this. When he learns the truth, he begins searching of her, and in the meantime, Prathiba, who is now reformed, commits suicide. Sekar meets Nirmala, who is on the verge of committing suicide, and they are reunited.
Madhavan marries Thangam. He takes care of Thangam’s mother and brother along with his younger brother. Meanwhile, Madhavan gives shelter to his father’s mistress and her daughter. The evil ladies allege Thangam for loose morals. The rest of the story is how they come into good terms.