Ponni is a 1953 Tamil family dram film starring Padmini, Sriram and Lalitha. A poor woman is left with two daughters when her husband dies. One of the daughters goes missing and is found by a wealthy who raises her as his own and names her as Kanmani. She is brought up in luxury and becomes very arrogant. Unknowingly, her elder sister Ponni comes to work as a maid at her house. Kanmani treats her badly. However, Ponni is soon accused of murder. What happens next forms the rest of the story.