Shankar is a successful businessman who has an inferiority complex due to his scarred face. When his wife Parvathi gives birth to a son who is also scarred, Shankar asks the doctor Raju to kill the child to prevent him from experiencing the same pain Shankar has experienced throughout his life. Rather than kill the baby, Raju takes him to an ashram, where he is raised by its Baba and named Kannan. Shankar and Parvathi are oblivious to Kannan's existence.

Kannan receives little affection growing up at the ashram. Meanwhile, his younger twin brother Vijay is raised with much fondness and pampering. Vijay falls in love with a girl named Nirmala, who rejects him. Vijay's friend Ananth regularly extracts money to construct a hotel, which Vijay manages to get for him. When Baba is dying, he tells Kannan he is not an orphan and to meet Raju to learn more about his past. Nirmala is revealed to be Raju's daughter.

Kannan meets Raju, who is shocked to see his resemblance to Shankar. At first, Raju refuses to tell Kannan about his parents but consents after Kannan guarantees he will only see his parents without revealing his identity. Kannan enthusiastically goes to see his parents at night but Shankar shoots him, thinking he is a thief. Nirmala later reciprocates Vijay's love. Kannan has a chance meeting with Parvathi at a temple, but she does not recognise him.

Parvathi tells Shankar what happened at the temple; Shankar believes it must be his firstborn and meets Raju, who confirms it. Shankar meets Kannan; he offers Kannan a large amount of money so he can live prosperously but does not invite him to live with them. Kannan rejects the money, saying he is content to know his parents. Vijay comes and asks his father for money; Kannan, who is hiding in a cupboard, gestures Shankar to give the rejected money to Vijay.

In the meantime, Ananth wants more money from Vijay, so he kidnaps Vijay and demands a large ransom from Shankar. When Shankar is about to leave with the ransom money, Kannan asks to go instead. Shankar refuses so Kannan knocks him out and goes to the planned meeting disguised as Shankar. Kannan rescues Vijay and kills Ananth but is mortally wounded in the process. Shankar, Parvathi and the police arrive at the scene of the shooting. Kannan dies in the arms of his mother, who accepts him as her son.