Pratidwani

Pratidwani is a 1971 Kannada film directed by Dorai-Bhagavan. The film stars Rajkumar, Rajesh and Aarathi in the lead roles, along with Narasimharaju, Balakrishna, Pandaribai in supporting roles, with Dinesh as the leader of the smugglers.
Plot.
As the name represents, pratidhwani (resound) in other terms, means reacting to what has happened. The film starts with the smuggler Dinesh as a good person, charitable in public. He has a driver who has worked for him a long time, but unfortunately one day, he overhears the smuggling meeting held between Dinesh and his co-worker. Knowing the truth, he conveys it to Dinesh's wife and decides to leave the job and run away from the village. But the same night, smugglers arrive to his home and kill the driver, his wife, and daughter. But his two sons and granddaughter are left alive who are still children now. They take an oath of killing the smuggler.
Now the children are grown up and separated. Anand (Rajesh) being the robber and in search of the killer. Ashok (Rajkumar) is a police inspector also in search of the killer. Narasimharaju as the son-in-law of Balakrishna, both being constables. During the wedding, Narasimharaju had promised to give 10,000; as he has not yet given it, he is not allowed to be with his wife and a comedy continues on the same. Ashok meets Aarathi and is in love with her who is now grown as the daughter of the killer and in reality is Ashok's sister's daughter. Once Anand comes to rob Ashok's house and sees his childhood photo and both of them had sworn to kill the smuggler. They go on attacking the killer in their own plan and finally with help of a small drama, they release the killer and send him to jail.