Kumarasami, an honest police constable, has a son Chinnaiah and a daughter Janaki. Prabhu, son of a rich affluent person is a friend of Chinnaiah who often visit his house. Prabhu falls in love with Janaki to which she equally reciprocates. She meets Prabhu secretly without the knowledge of both her father and brother. One day, Prabhu's notorious friends commit a murder and they flee the scene via Prabhu's car. At the same point of time, Prabhu meets his love in a temple and promises to marry her.

Meanwhile, Prabhu's father plans to marry his son to one of his relatives. Prabhu initially discards this proposal but accepts after coming to know that he will be deprived of his father's wealth if he does not marry the girl arranged by his father. Janaki is shocked to hear this and finally tells her relationship with Prabhu to her parents. When Chinnaiah visits Prabhu's house to seek justice, Prabhu reiterates that Janaki is completely unknown to him. Janaki health begins to deteriorate and despite Prabhu's selfish motive, she prays for his good health.

Police arrest Prabhu for the murder committed by his friends and Janaki testifies as an alibi. Police arrest the actual murderers. A now regretful Prabhu comes to marry Janaki, but is too late. Janaki's health completely deteriorates and she eventually dies.