Plot
Pandian's four sons, Sathyamoorthy, Jeevanandham, Kathiravan and Jayakannan, run Pandian Stores, a famous grocery store in their hometown Kundrakudi. Dhanalakshmi, a well-educated courageous girl, enters the life of Sathyamoorthy against her family's wishes and leads the Pandian stores family to get well settled. She raises her brothers-in-law as her sons.
Fifteen years later Jeeva, Kathir and Kannan are adults. Sathyamoorthy lives happily along with his brothers Jeeva, Kathir and Kannan and his caring wife Dhanalakshmi. They run a grocery store named Pandian stores which is famous in their locality. Dhanam is often criticized by her relatives for not having children repeatedly, although her brother-in-laws did not let it affect her.
Lakshmi, the brothers' mother has a brother named Murugan with whom she has not been on talking terms for years. Murugan's daughter Mullai desires to marry Jeeva. Murugan convinces Lakshmi to accept this marriage. However, Jeeva dislikes this idea of marriage as he is in love with collegemate Meena. Later he conveys this to his sister-in-law Dhanam. Dhanam feels offended when she tries to talk about this to Meena's father Janardhanan. Meena's father thrashes her, so Jeeva sacrifices his love and accepts Mullai's marriage proposal. On the day of wedding Meena flees from her house and creates a scene in the marriage hall. Later, Dhanam decides to have Mullai marry Kathir, the younger brother to Jeeva. Jeeva marries Meena and Kathir marries Mullai. Mullai blames Dhanam for ruining her life by marrying her to Kathir. But later she gets on well with her (Dhanam) when her mother berates Dhanam. Meanwhile, Meena often picks fights with Jeeva as she wants a lavish lifestyle. On the other hand, Dhanam and Moorthy try their best to unite Kathir and Mullai, who are at loggerheads.
Due to a misunderstanding Janardanan (Meena's father) slaps Kannan. This enrages the family and Janardanan stops sending goods to Pandian Stores, causing a crisis for the Pandian family. Moorthy decides to resolve the crisis and leaves the town, handing the responsibility to Jeeva. Janardanan plans to make the family suffer more by sending some fake clients to Pandian stores to give a marriage order. Jeevan believes the fake clients and agrees for the order believing that Moorthy would definitely return with the goods. Moorthy returns and tells everyone that he could not get the goods much to Jeeva's horror. He asks Kathir and Jeeva to manage the situation with the remaining goods. But Jeeva reveals all those happened during his absence. Moorthy scolds Jeeva for being immature while Kathir takes upon himself to make the ends meet. Finally he acquires the goods and Moorthy praises him which pleases Mullai and irks Meena. Later, Kathir and Mullai befriend each other and Meena adjusts in the house. Meena wishes to go for a honeymoon but ends up going with the whole family except Moorthy and his mother. During this time, Kathir and Mullai grow closer. At home, Parvathy and Murugan take care of Moorthy's mother and the business, respectively. But Parvathy forgets to give medicine for Lakshmi (Moorthy's mother). When she falls unconscious Moorthy and Murugan rush her to the hospital and is saved. Meanwhile, Kathir, Mullai, Meena, Jeeva, Dhanam and Kannan return. After their return, Mullai and Kathir develop feelings for each other but are unable to confess. One day while Kannan Dhanam Meena and Mullai are talking, Kannan asks Mullai about her love for Kathir. She tells them that how they used to fight with each other in the beginning and how she acted as if she cares for him to avoid petty arguments. Kathir hears this and feels hurt. Mullai expresses her love for Kathir to Dhanam Meena and Kannan. When Kathir returns home at night he picks up a fight with Mullai. Disheartened, Mullai leaves to her parents' house. Mullai misses Kathir while he feels that he is unfit for her. Meena gets pregnant. The family is overwhelmed especially Dhanam. She takes good care of Meena and does everything to please her. Mullai returns on her birthday but Kathir has gone to Mullai's house to surprise her. When he goes there, Parvathy taunts him. On the other hand Mullai thinks that Kathir is still angry with her. Kathir waits for Mullai but leaves for home when it is late. Mullai is in their room waiting for Kathir. When Kathir returns home, he sees Mullai but thinks that he is dreaming about Mullai. When he realizes that Mullai has returned, he struggles to wish her happy birthday but somehow wishes her seconds before twelve. Moorthy and Dhanam advise them to set things right between them. It is revealed that Dhanam and Moorthy deliberately decided not to have children as Moorthy's brothers were too young. Learning this, Dhanam's family is enraged and Jaga breaks his ties with Moorthy. Mullai learns about the great sacrifice but Dhanam stops her from informing the others about this. But somehow she reveals the truth to Kathir when he discusses about Dhanam's mother blaming Moorthy for all those Dhanam has to face. Kathir meets Jaga and assures him that he will take Dhanam to a doctor. He along with Mullai plan to get an appointment for Dhanam.
On the other hand, Janardanan is enraged upon learning that Meena is pregnant and no one informed him. After much convincing, Janardanan agrees to meet Meena. His wife asks her to come to her house and stay for a few days. Moorthy and Dhanam ask Jeeva to accompany Meena but refuses to go. Somehow, they manage to convince Jeeva and he half-heartedly leaves with Meena.
Janardhan includes Jeeva in all of his business dealings. Later, Kathir and Mullai request that Dhanam come to the hospital. But she refuses. Mulla later becomes ill and isolates herself. Soon, Meena detects a threat to her unborn child. Janardhan afterwards lashes out at her family.
Meanwhile, Kathir is detained when a moneylender disparages Mulla. Mulla donates her jewels as payment for Murugan's debts. The family prepares for Meena's Baby Shower. Meena goes into labor shortly after the ceremony and has a daughter. Meena and her daughter are confined to her father's home. Later, Kathir and Mulla travel to Chennai, where she understands Kathir is not guilty.
Dhanam and her family go to the temple, when Kamakshi cries out, claiming that Moorthy is liable for Dhanam's infertility. Moorthy and Dhanam are confronted by Lakshmi. Dhanam later arranges a nuptial night for Kathir and Mulla. After learning of her parents' deaths, the family invites Aishwarya into their home. Janardhan organises a baby-naming ceremony for Meena's baby, who later receives the name 'Kayalveli'.
Kayal causes Meena and Jeeva problems. Meena is concerned as Kayal sobs uncontrollably and blames Dhanam for failing to care for her. Meanwhile, Dhanam is worried and chooses to have herself tested for pregnancy. She discovers she is pregnant and decides to keep it a secret. Janardhan causes mayhem and urges Meena to stay with him. Dhanam informs Moorthy of her pregnancy. On Mulla's birthday, Kathir surprises her by taking her to the temple.
Moorthy informs everyone about Dhanam's pregnancy. Meena returns home after discovering this. The family organizes an event to commemorate Dhanam's pregnancy. Dhanam is told not to perform any housework. Mulla accepts her responsibilities. Lakshmi and Dhanam reprimand Mulla for cooking recklessly. Later, Meena's aunt Rasathi pays her a visit, intending to separate her from the Pandian Stores family. Rasathi's unusual conduct irritates the family. Meena understands the truth and expels her.
