In
Thiyagavalli, Sivadhanu is an unemployed post-graduate and is the eldest son of a poor family. He has the responsibility of marrying his sister Lakshmi and taking care of his two younger brothers. Once, Chokkalingam, a rich businessman in
Mayavaram notices Sivadhanu at the market while waiting for Chidambaram Mudhaliar. Impressed with his genuineness and enthusiasm, he inquires Mudhaliar about Sivadhanu. Though being rich he approaches Sivadhanu's family to marry Sivadhanu to his elder daughter Parvathi and make the son-in-law look after his businesses. Though Sivadhanu does not like the idea of living in Chokkalingam's house after marriage, Mudhaliar convinces Sivadhanu and his family, that his father-in-law is capable of fetching him a job. Soon after moving into Chokkalingam's house, Sivadhanu feels he is treated as a manservant, his independence is lost, and is made to look after the restaurant of Chokkalingam unwillingly. One day his friend Panneer stumbles upon him and sees Sivadhanu being publicly insulted by Chokkalingam for his decisions. Panneer remarks that the poor should never be married to a rich bride and live at their father-in-law's place because the in-laws will always treat them as inferiors. Sivadhanu also learns that his father-in-law has advised one of his close relatives,
P. D. Elangovan MP not to recommend for any government jobs for which Sivadhanu had requested him earlier. When Sivadhanu's brother visits him to inform him about Lakshmi's prospective groom, Sivadhanu's in-laws insult him for their poverty, which Sivadhanu overhears. Unable to bear his brother's humiliation, Sivadhanu returns to his home without telling anyone but is again convinced by Mudhaliar to return to his in-laws' house. Sivadhanu calms Parvathi for leaving her uninformed but is overjoyed to know that an appointment letter from
NLC as a geologist has arrived. Despite Chokkalingam's resistance Sivadhanu leaves alone to join the job. In a few months, Parvathi becomes pregnant while Sivadhanu arranges for Lakshmi's marriage. For that, when Sivadhanu tries to take Parvathi to his home a couple of days before the wedding, her parents refuse to send her citing health reasons. Unreachable and hectic at work, a situation arises where he cannot even visit Parvathi during her delivery, and a girl child is born. After making adequate arrangements in the staff quarters, Sivadhanu asks Parvathi to accompany him to
Neyveli, but she again refuses, which annoys him. Seeing Sivadhanu angry with Parvathi, Chokkalingam beats Sivadhanu and throws him out of the house. Unable to recover from the humiliation, he goes home heartbroken. Again Mudhaliar comes to make peace, but now replies how Chokkalingam and his family had humiliated him and his family citing their poverty, and refuses to back to their house. A few months pass by and Sivadhanu who has been living a lonely life, has requested a transfer to
Dhanbad, which makes his family saddened. Sivadhanu's superior and his wife, visit Chokkalingam and request him to send Parvathi along with Sivadhanu but Chokkalingam angrily refuses to send Parvathi and his granddaughter along with them. Parvathi goes against her will and stays with her parents as per her father's advice. Before Sivadhanu leaves for Dhanbad, a situation arises where he has to attend his close friend Pokkiri's wedding which is situated near Parvathi's house. Even as Sivadhanu walks past Parvathi's house, he hears his toddler daughter Madhavi's cry and yearns to see her, but the humiliation makes him unable to stay there anymore, Sivadhanu quickly leaves the wedding. When Parvathi learns that Sivadhanu has come to the wedding, with a change of mind, she runs and reunites with Sivadhanu, now with the determination that it doesn't matter what her father thinks. == Cast ==