Venkatadri (Venkatesh) is a tough bodyguard who is assigned to protect the family of Varadarajula Naidu (Prakash Raj). Keerthi (Trisha Krishnan) is the college going daughter of Naidu and Venkatadri accompanies her to the college to keep a watch. Fed up with the close scrutiny maintained by Venkatadri, Keerthi hatches a plan with her friend Swathi (Saloni Aswani) to divert Venkatadri???s attention. Keerthi tries to distance herself from Venkatedri by calling him from a private number, Venkatadri falls in love with the girl without knowing that it is Keerthi herself. At one point, Keerthi too feels herself becoming attracted to Venkatadri and expresses her desire to meet him in person. However due to circumstances they are not able to accomplish this until at the climax when she tells Venkatadri to meet at a railway station and elope with her. Venkatadri agrees, unaware it is Keerthi. Varadarajula Naidu comes to think that Venkatadri and Keerthi are going to run away. In order to save Venkatadri’s life from the anger of Varadarajula Naidu, Keerthi lies that Venkatadri is meeting another girl at the train station. Varadarajula Naidu lets Venkatadri leave as he is desperate, but tells his henchmen to kill Venkatadri if a girl does not come there at the station (which implies that Keerthi loves Venkatadri). Terrified, Keerthi sends Swathi to the station and tells her to tell Venkatadri that she is the lover and that she won’t be able to make it to the station. Swathi, seeing Venkatadri, falls in love after all that has happened, and pretends that she is the lover. Keerthi calls her, but Swathi throws the cellphone away, hoping to erase Keerthi from his life completely. Many years later, after Venkatadri and Swathi’s marriage, they have a son. Swathi passes away shortly after. However before her death, she leaves a diary for her son that outlines the whole story between the phone calls of Venkatadri and Keerthi and their love. The son later goes to Keerthi’s house with Venkatadri to visit an old Varadarajula Naidu. Venkatadri is shocked that Keerthi hasn’t married. The son asks Keerthi to come with him and become his mother and Venkatadri is angry at his son for saying something so blunt and rude. But Varadarajula Naidu begs Venkatadri to take Keerthi as his wife. So they go onto the train together but the son runs away before leaving and throws the diary into a trashcan nearby. Venkatadri finds the diary and realises soon that his real lover, the girl who had waited for him for so many years faithfully, was Keerthi. He calls Keerthi on her cellphone and addresses her as Bangaram. Keerthi is overwhelmed with joy and happiness realising that Venkatadri has come to know of the truth and her identity. She runs toward Venkatadri and they both hug each other while his son is happily watching them.