The film revolves around twin sisters who get separated at birth due to circumstances, and cross paths as adults.

Lalitha is brought up by a rich person, Panchanatha Mudaliar, and the other twin Shenbagam by their mother Kamakshi.

[3] The film was directed by T. Prakash Rao, produced by T. K. Ramasamy under the banner Vasumathi Pictures, and its dialogues were written by M. S. Solamalai and Maa.

[5][6] Kathiruntha Kangal was released on 25 August 1962 by Vijayasri Pictures,[7] and emerged a commercial success.

[4] Kanthan of Kalki positively reviewed the film, calling Savitri's dual role performance it's high point.