A hard working man who has three daughters owns and manages a restaurant. Impressed by the sincerity of his newly appointed hotel manager, he decides to get his youngest daughter married to him, but the other two sons-in-law do not like him.
Koodi Vazhnthal Kodi Nanmai is the story of three brother and their families who live together.
Sivaraman, an honest government clerk, and his wife Lakshmi, belong to a middle-class family and they have two children. Anja Singam Marudupandi, a corrupted politician, moves into a new house near Sivaraman's house. Marudupandi's life style influences Lakshmi and she tries to ape him by buys luxurious items on installments. This puts pressure on Sivaraman and he takes a loan from his office peon but the police arrests him for corruption. He later finds a job in a brandy company with Marudupandi's recommendation.
Three wives are disappointed with their husbands who borrow money from people to live luxuriously. After the women get employed to earn more, their spouses start plotting against them.
The story begins with a group of government officers who come to list the number of devastated houses. The officers promised them to give a big amount to build their house but in exchange for a little amount to register their name.
Indra and her three sisters are married off to mediocre men by their patriarchal father. However, he realises their importance when his son stirs discord in the family.
Subramani, Vellaisamy, Arumugam and Ponrasu are four friends from poor family; they are graduate but they cannot find a job. Their fathers feel that they are good-for-nothing and decide to corrupt the politician Anja Nenjam to find them a decent job. Anja Nenjam is linked to Pannaiyar, a ruthless landlord who exploited the villagers. Pannaiyar orders him to flee with their money, otherwise, nobody will respect him. Their friend Pazhanisamy, who is supposed to be a supervisor in the city, is back to his village and was also cheated by Anja Nenjam. The five friends decide to become milk suppliers in their village.
