One day, he is assigned the task of curing a mentally unstable woman Sowbagyavathi "Shobha" who lives in Kodaikanal.

Shobha, at a very young age, got married and within hours, the couple met with an accident and her spouse died.

Due to the aftermath of the accident and upon learning of her husband's death, Shobha loses her mental stability.

[5] Sundarrajan initially refused to play a father's role in the film as he wanted to be the lead actor, but was persuaded by a friend who noted that "heroes had a short shelf life, but 'fathers' would always be in demand".

[7][8] Srikanth who earlier worked in American Consulate and was also a theatre artist made his film debut as lead actor.

[7] While scouting for an actress to play Srikanth's pair, Sridhar initially chose Hema Malini, but later dropped her after feeling she lacked the maturity needed for the character; he chose debutant Shanti for this role whom he rejected for Rajasree's character in Kadhalikka Neramillai (1964), she was rechristened Nirmala.

[15] It received an "A" (adults only) certificate from the CBFC;[16] according to The Financial Express, this was due to one song sequence featuring Jayalalithaa bathing in a waterfall while wearing a sleeveless blouse,[17] whereas T. A. Narasimhan of Hindu Tamil Thisai claimed it was due to a scene where a patient requests a doctor to unhook her outfit.

[16] Kalki lauded the story, cast performances and picturisation of Kodaikanal scenes, thanking Sridhar for boldly making a film with newcomers.

[19] After the film's success, Nirmala and Moorthy added Vennira Aadai to their respective stage names.