Police Public is the story of Inspector Shahnawaz Khan (Kabir Bedi) who investigates a murder case that has no eye witness. Later on, however, he is transferred to a next town by the clever industrialist Mr. Sharma (Prem Chopra) and his politician friend Mr. Tiwari. Replacing Shahnawaz Khan is inspector Maha Singh Garhwal (Naseeruddin Shah) who is known for twisting the case the other way round by accepting bribe from Sharma and his friends. But by the many attempts of Shyam and Mr. Ram Swarup of high officials a CBI officer Jagmohan Azad is sent to the area in order to investigate on the crime. However, the officer suspect a foul play between Sharma and his friends and decides to investigate more. On the evidence that he found it was proved that Sharma and his friends were involved in the murder case. The inspector even gathers a piece of evidence that will prove Sharma and his friends guilty and shed some light on the case.