Kadhiravan, a successful entrepreneur and socially responsible individual, manages his software company, Amma Menporul. His parents are searching for a prospective bride for him, but Kadhiravan's priorities are put to the test when he encounters his friend Kabilan's parents at an orphanage, where he is organising a food drive. Kabilan's parents have been forced to leave their home by their daughter-in-law, Shalini, who finds them uncomfortable to live with. Kadhiravan confronts Kabilan, who laments his inability to decide. This incident prompts Kadhiravan to look for a partner who will care for his parents. While watching a TV program, he is impressed by Kayalvizhi "Kayal", a college student from
TNAU, Coimbatore, who shares her aspirations of being an ideal wife, mother, and daughter-in-law. Kayal's emphasis on the importance of her large and loving family resonates with Kadhiravan, and he feels she might be the right partner for him. Kayal belongs to a big joint family, consisting of her grandfather Selvanayagam, her three uncles, and their wives. Determined to win Kayal's heart, Kadhiravan travels to Coimbatore with his friend Kalai. However, meeting her in college doesn't yield the desired results. His plan to send thousands of greeting cards also fails. Kadhiravan notices an advertisement by Kayal's grandfather, Selvanayagam, seeking quotations to renovate their traditional home. He sees this as an opportunity to enter Kayal's life and decides to learn interior designing from Vennila, a leading expert in Coimbatore, to make his approach genuine. Posing as an interior designer, Kadhiravan gains entry into Kayal's home and wins the hearts of her family members with his good nature. Kayal, too, develops feelings for him, but Kadhiravan keeps his true identity hidden from her family. As the project nears completion, Vennila realises that Kayal is falling for Kadhiravan. After a conversation with Vennila, Kayal discovers that Kadhiravan took on the job solely to win her love, and she soon reciprocates his feelings. However, their relationship is put to the test when Kadhiravan and Kayal encounter a group of thugs in
Kerala, leading to a trip to the police station. When the police contact Kayal's family, they realise that she is in love with Kadhiravan. Kayal's family, who claim to be orthodox and believe that love marriages are doomed to fail, reject her union with Kadhiravan. Instead of restricting her, they provide her with a car and give her the freedom to do as she wishes, but with the expectation that she will prioritise the family's reputation. Kadhiravan, who wants to marry Kayal with her family's blessings, faces opposition from her uncles, who send goons to attack him. Despite being beaten by Kayal's uncles, Kadhiravan chooses not to retaliate, instead seeing their actions as a manifestation of their love for Kayal. Kayal pleads with her family to accept Kadhiravan, but they remain stubborn in their refusal. When Selvanayagam plans to marry Kayal to her cousin Mugilan, Mugilan's father, Vetriselvan, refuses, suspecting that Kayal may have consummated with Kadhiravan. This creates a rift within the family, and Kayal's three uncles leave the house, citing public disrespect due to Kayal's love for Kadhiravan. Kayal's father, Thirunavukkarasu, pleads with his brothers-in-law to stay, but they depart with their families. Kayal and her parents also leave the house. The house help, Mani, informs Kadhiravan about the situation, and he rushes to Kayal's house. However, upon arrival, Kadhiravan finds Selvanayagam having a heart attack and manages to ruch him to the hospital just in time, despite the family's resistance. Moved by the family's plight, Kadhiravan reveals that he loves Kayal and her entire family, regrets potentially causing the family split, and even offers to renounce his love for Kayal to reunite her family. Overwhelmed, Kayal bursts into tears as Kadhiravan apologises and leaves. Kadhiravan returns to his home in Chennai but is surprised to find his home decorated and Kayal's entire family waiting to welcome him. In a dramatic turn, Selvanayagam and the rest of Kayal's family have undergone a change of heart, accepting Kayal's marriage to Kadhiravan. The two finally unite, bringing joy to both families. == Cast ==