'Gabbar Singh' is an action-oriented masala movie that is liberally spiced with all the elements of commercial cinema. This fast-paced drama revolves around Venkatarathnam Naidu (Pawan Kalyan), son of Suhasini and step son of Nagineedu who is deeply affected by his mother's remarriage, and is constantly in conflict with his step-father and step-brother.
As an adult, he becomes police officer who uses dubious means to achieve justice and calls himself Gabbar Singh, after the infamous gangster from the movie, Sholay.
When he is posted to his hometown Kondaveedu he is exposed to all the illegal activities of the local underworld. He comes to know of Siddhappa Naidu (Abhimanyu Singh) who is a local goon in the village who aspires to turn politician and finally it leads to the rivalry between the two. Meanwhile, he also meets a beautiful village girl Bhagyalakshmi (Shruti Haasan) and falls in love with her, despite her troubled economic circumstances.
When his step-family gets into some trouble, his step-brother Ajay, is forced to take the assistance of a canny Siddappa, which sparks a sequence of events that will put even the wily Gabbar Singh to test. Will he settle the long feud with his step-family? Can be successfully defeat the criminal forces in the town and establish peace and harmony?