Gopinath (Gemini Ganesan) falls in love with Janaki (Sowcar Janaki) and they get married in Kasi. The marriage is not accepted by Gopinath’s mother and the couple gets separated. Janaki is pregnant and her father (V. S. Raghavan), realising that no man will marry Janaki a second time, decides to make her a collector. Gopinath meanwhile had moved to South India, where he later married Jaya (Jayanthi) by hiding his previous marriage. They live a happy life with their three children and Jaya’s father. Gopinath works as a clerk in the collector’s office. A new collector arrives at the office, and it turns out to be Janaki. They tend to work together, until one of the employees in Janaki’s office, Babu (Nagesh), spreads a rumour stating that there is an affair between Janaki and Gopinath. This rumour reaches Jaya and she is completely disturbed. Jaya discovers the secret of Gopinath’s affair with Janaki. Meanwhile, the sons of both Janaki and Jaya, Ramu and Prabhakar drowned in water and have been admitted to Hospital. Somehow Jaya manages the disturbance of the secret and accepts Janaki as her sister. But Ramu dies in hospital while Prabhakar survives. Jaya gives Janaki her son as a gift. Janaki and Prabhakar leave for abroad as Janaki got her duty abroad.

The Portuguese want to set up an army base in Vasanthapuri, a zameen in Tamil Nadu, India. They approach Diwan (M.N. Nambiar), a corrupt citizen of the area and decide to make him the king if he agrees to carry out the plan. He subsequently agrees, but none of the local people are happy and protest against this.

Ponnaiah, a factory worker, loses his eyesight after an accident, and his family faces financial trouble. So, Bhaskar, his son decides to go to work to support his family.

Shivaji , a CID officer is on a mission to bust a gang that is flooding the market with fake gold bars. The gang which had abducted a brilliant scientist who is an expert in alchemy had not been getting his cooperation to perfect the fake gold bars. The scientist daughter , Bharathi unaware that her father is a captive with the gangsters is leading a happy , carefree life with the fat purse sent every month by the gang , supposedly from her father. Shivaji , during his investigation first suspects Bharathi to be part of the gang, but later finds out the truth and falls in love with her. But the gang abducts Bharathi also to force her father to cooperate. Shivaji trails the leads and lands in the gangster’s den. There is a twist. His mother reveals that the leader of the gang is none other than his own father who deserted the family when Shivaji was a kid. Torn between duty to the country and his love for his mother, he decides to confront the gangster unarmed and gets shot by his father. Luckily he survives and the father repents and surrenders to the police. The scientist is released and Shivaji marries Bharathi.