During 1920, the time of British Raj in Madras State a train accident separates freedom fighter couple Santhamma and husband Dharmarao . However, Santhamma survives and brings up her son Sathyadev and adopts another son Arjun and inculcates in them Gandhiji's principles. Arjun participates in the 1930 Salt Satyagraha, kills a British Officer, and flies the Indian tricolor flag. On the other hand, DSP Sankara Rao the brother of Santhamma, working under British administration, summons Santhamma for the act and her son Arjun is imprisoned.
