An honest police constable has a son and a daughter. Balaji, son of a rich affluent person is a friend of Muthuraman who often visit his house. Balaji falls in love with Vijaykumari to which she equally reciprocates. She meets Balaji secretly without the knowledge of both her father and brother. One day, Balaji's notorious friends commit a murder and they fled the scene using Balaji's car. At the same point of time, Balaji meets his love in a temple and promises to marry her. Meanwhile, Balaji's father plans to marry his son to one of his relatives. Balaji initially discards this proposal but accepts after coming to know that he will be deprived of his father's wealth if he doesn't marry the girlarranged by his father. Vijaykumari is shocked to hear this and finally tells her relationship with Balaji to her parents. When Muthuraman visits Balaji's house to seek justice, Balaji reiterate that Vijaykumari is completely unknown to him. Vijaykumari health begins to deteriorate and despite Balaji's selfish motive, she prays for his good health. Ironically, police arrest Balaji for the murder committed by his friends and Vijaykumari testifies as an alibi. Police arrest the original murderers. A now regretful Balaji comes to marry Vijaykumari, but it's too late. Vijaykumari's health completely deteriorates and eventually dies.
Cast
Cast according to the opening credits of the film: ;Male cast
Policekaran Magal was based on the stage play of the same name written by B. S. Ramiah. S. V. Sahasranamam and R. Muthuraman who were part of the play reprised their roles in the film. C. R. Vijayakumari played the titular daughter of Sahasranamam's character, a policeman, while K. Balaji played a youth who cheats the policeman's daughter. The dialogues were written by Thanjai N. Ramaiah Dass.
Soundtrack
The soundtrack was composed by Viswanathan–Ramamoorthy while the lyrics written by Kannadasan. The duets of P.B.Srinivos and S.Janaki were all-time hits and the songs remain popular to this day. Indeed, the success of the film was in no small measure to the lovely songs. The film also cemented the combination of P.B.Srinivos and S.Janaki as a winning combination in the Tamil film music industry. The album was released under the label Saregama. The song "Ponn Enbean Siru" is set in the carnatic raga known as Darbari Kanada. The song "Nilavukku Enmel Ennadi Kobam" attained popularity.
