Thullum Kaalam

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Sindhuraj alias Sindhu (Shankar) is a carefree plus two student who lives in Polur with his elder sister Porkodi (Vineetha), the village teacher whereas his elder brother Santhosh (Murugan) is an upright military officer. Porkodi lives only for her brothers and would do anything for her brothers. Sindhu always hangs out with his friends and enjoys teasing the villagers. Tamizhselvi (Heera) is a hard-working and haughty plus two student who hates her cousin Sindhu. After successfully passing the exam, Sindhu and his friends decide to pursue a bachelor's degree in science and apply to one of the colleges in the city. At the college, his college mate Divya (Megha) fall in love with him, she is from a rich background. At the annual inter-college competition, Sindhu sings a song and won the first prize making the college proud. Later, Santhosh, on the holiday, returns to his village from the military camp. Her sister wants her brother Santhosh to marry her cousin Thamizhselvi but Thamizhselvi refuses to marry him for not getting enough money and humiliates them. When Divya wanted to introduce her lover Sindhu to her parents, Sindhu stood them up for various reasons. The first time, he got an opportunity to sing in a concert, so Divya's parents were understanding. While the second time, it was the last of college, therefore, his friends and he celebrated and got drunk, Divya and her parents were disappointed that he did not come. Worried about Sindhu, Divya goes to his college dorm and she sees the drunk Sindhu talks ill about her. The next day, Sindhu realizes his mistake and apologizes to Divya. Divya, who sincerely loved him, tells him that he was too reckless and immature to be her life partner. Divya and her parents are about to move to the United States and before leaving, she tells Sindhu that he has missed an opportunity to make it big in life. Thereafter, all his friends decide to pursue a master's degree in science while Sindhu has to clear all his arrears to complete his bachelor degree. Sindhu finds himself alone, isolated and mocked by the villagers. In the meantime, Thamizhselvi, who refused to marry grooms for not being rich enough, finally agrees to marry a doctor when she discovers that her mother (Rajini Nivetha) has cardiovascular disease. The day of the wedding, the groom demands a huge dowry but Thamizhselvi's mother tells them that she has not that much money and the wedding is cancelled. The carefree Sindhu and arrogant Thamizhselvi who both fail in life decide to marry. Sindhu then gets an opportunity to sing in a feature film. The film ends with Sindhu and Thamizhselvi living happily.