Ganesan has tremendous love for his cousin Valli right from his childhood. Things go wrong for him when his mother dies; his father marries another woman which he dislikes and runs away from home. He returns home after twelve years only after his father's death. He even accepts his brother born to his stepmom. Ganesan's love for Valli remains unchanged. In fact, he returns home after so long time only to win her love and marry her. On the contrary, Valli loves another person Raghu, who is an orphan and also jobless. Her father dislikes this; he lays a condition that he would agree for their marriage only if Raghu finds a job. Ignorant of the fact, but with good intention, Ganesan offers a job to Raghu. Later, he learns about the fact and gets despaired. In such a circumstance, Vadivelu resolves to unite his brother with Valli. Vadivelu tactfully implicates Raghu in a murder case and sends him to prison on the day of marriage. Thus he plays a spoil game in averting marriage between Valli and Raghu. In such a distressing condition, Valli's father, with no other option remaining, pleads with Ganesan to marry Valli. He readily agrees and marries her. But Ganesan feels guilty of cheating Valli and keeps distance with her. Valli, although not interested in this wedding, slowly starts liking Ganesan's good character. Three months pass by and one day Valli overhears Ganesan's conversation with his brother and finds out the truth. She gets angry and locks herself in a room. Ganesan tries to convince her but in vain. Ganesan decides to save Raghu and informs the truth to police following which Raghu is released from prison. Ganesan also convinces Raghu to marry Valli promising that there was no relationship between him despite three months of married life. Raghu agrees to marry Valli. As per the village custom, a function is organized where Valli needs to remove her mangalayam tied by Ganesan which will be followed by her wedding with Raghu. But Valli vomits during the function which makes Raghu suspicious about her relationship with Ganesan. Raghu wants the wedding plans to be cancelled. Now Valli reveals that she pretended to vomit to just check Raghu's trust on her. As he has no trust in her, Valli says that Ganesan is the one who really trusts her and loves her truly. Ganesan and Valli unite in the end.
Cast
Livingston as Ganesan
Rambha as Valli
Vadivelu as Ganesan's brother
Vinu Chakravarthy
Vadivukkarasi
Madhan Bob
Mayilsamy
Pasi Narayanan
Bayilvan Ranganathan
Production
Livingston told the story of "Sundara Purushan" for every producer, but producers insisted him to handle direction instead of portraying lead role, but it was R. B. Choudhary who encouraged him to portray lead role.