Alekhya, a journalist witnesses the murder of a fellow journalist who had discovered evidence against a mafia boss, Dhanush, and wants to sue him for his colleague's murder. Alekhya is harassed by Dhanush when he discovers that she has the evidence. Dhanush is the most influential person in the region who runs Hindu Seva Samithi, but in reality, he is an undercover Islamic militant on a mission to release their terrorist group head imprisoned by the state administration. Dhanush is a Hindu devotee who teaches the Bhagavad Gita to every human he meets. Alekhya happens to see an accident in which a bunch of Dhanush's henchmen dies. She takes this opportunity to create a character and name after the freedom fighter "BOSE". She writes a letter that Bose has done this assassination to end crime in the city and state. The word spreads like wildfire that there is a man called "Bose", who is the rescuer of a common man.
A man named Subhash Chandra Bose, has a widowed mother, a sister named Yamuna, and a fiancée named Kanaka Mahalakshmi to take care of. As Yamuna's marriage is fixed, Bose goes to Secunderabad, to get the ten lakhs he saved in a chit fund company. There, he happens to be involved in a few bomb-blasting incidents and rescue incidents and avoids all the bomb blasts and crimes without his knowledge. People start to think that he is the "Bose". Alekhya meets him and explains to him her mission of ending crime in the state.
However, Bose is more interested in retrieving money from the chit fund company and going back to his home to marry off his sister. He refuses to enact the role and take the responsibility of the legendary character "Bose". But later on, the chit fund company turns out to be bogus, which was managed by Dhanush, to generate finance for the smuggling of ammunition to Pakistan. Upon seeing the victims of the chit fund company committing suicide, Bose wears the mask of 'Bose' to stop Dhanush's mission. All these incidents make Dhanush extremely frustrated, so he kills and blasts Yamuna at her wedding. Bose also learns that Dhanush is not a Hindu, but an Indian Mujahideen terrorist under the guise of a Hindu and is on a mission to destroy India.
Dhanush demands the state administration release of their militant leader in exchange for the lives of train passengers hijacked by Dhanush en route to Pakistan via Punjab, India. Sameer, an IPS officer requests for a chance to fight them off instead of exchanging lives who would kill more people if released. Dhanush provokes Sameer that being a Muslim man, he is opposing his jihad. After Dhanush tries shooting him with Pakistan made bullet, he kills himself with his service revolver, just as freedom fighter Azad escaped the English bullet.
Bose now goes alone and gets badly beaten up by Dhanush. After Dhanush lashes out that he would destroy India, Bose gets up and kills Dhanush.
After the death of Danush Bose hides his identity and Alekhya as she promised earlier she too keeps this as a secret. Then Bose go to the grave yard near his sister's coffin there he meets Alekhya who came to see her colleague's coffin. She says that Bose was really the fighter. She thanks him for leading the Mission Bose sucessfully. He then reunites with his family.
One day Bose recieves a phone call from Alekhya for another Mission
The story continues...