Pillaiyo Pillai is 1972 Indian Tamil-language romantic drama film directed by Krishnan–Panju, produced by Murasoli Maran and written by M. Karunanidhi. The film stars M. K. Muthu (in dual role) in his debut film appearance alongside Vijayakumari and Lakshmi, while Manohar, M. R. R. Vasu and G. Sakunthala play supporting roles. It was released on 23 June 1972 and emerged a commercial success.

Plot

Gangatharan, a criminal and womaniser, poses as a noble man in public. He involves in stealing temple sculptures. Gangatharan murders his first wife and frames the crime his servant Murugan, who is arrested. Murugan escapes from prison and kidnaps Gangatharan's son and raises him as his own. Gangatharan gets remarried to Kanchana, whom Murugan kidnaps. But he releases her, when Kanchana confesses that she is bearing a child. When Gangatharan learns of his wife's pregnancy, he drives her away, she gives birth to a son. Years later, the boy raised by Murugan, Kumar, is a doctor. Kanchana's son Kannan grows up to become a straightforward and hardworking person. Confusion ensues as the public prosecutor's daughter falls in love with one of the sons, often mistaking Kannan for Kumar. As part of his plans to wreak vengeance, Gangatharan accuses Kumar of stealing a ring and beats him up. How the problems are solved forms the rest of the story.