Protagonist Gowri Shankar (Harish T Jalgere), who hails from a happy middle-class family, murders a local leader Naidu (Sharath Lohitashwa) in a fit of rage. After completing his jail term, Gowri tries to lead a normal life, but it turns out to be futile, as his rivals are baying for his blood. Gowri ends up indulging in in illegal activities without his knowledge and even joins hands with the local corporator, Babana.
Rajanna (Charan Raj), Gowri's father, wants to lead a respectable life, despite facing humiliation. So, he deserts his son, who becomes famous in the underworld. There is a twist in the tale when Rajanna's files a complaint against Gowri for confiscating a piece of his land. Diligent cop Vijay Kumar (Rajesh Nataranga), who registers the case, wants to wipe out rowdyism. Gowri, on the other hand, wants to get closer to his family. Will Gowri be able to lead a normal life or will he face the consequences of his misdeeds?
Rajanna Maga has a cliché story line, which falls flat. The director has used the same old formula of the underworld, father-son sentiment, and a love that turns out to be a disaster. Charan Raj and Aruna Balraj shines in their role as parents. This movie is recommended for those who enjoy watching blood shed.