The movie begins with Chandu (Siddharth Narayan) and Siri (Shruti Haasan) as childhood friends. Chandu and Siri call each other "Faltoos" and "Killer", respectively, affectionately. Their friendship remains intact even as they grow up. Chandu who was sent to Mumbai to do MBA, instead learns music and returns home which leads to agony of his father. However, Siri convinces Chandu's father that it is her responsibility to take care of Chandu's career. They go for an audition where they get into a fight with a band and he is sent out of the audition. Prior to that, Siri accepts love proposal by Uday (Navdeep), who lives in US after consulting Chandu. Later, Chandu and Siri accidentally meet their common friend in college, Ritu Sharma (Hansika Motwani) and Chandu falls in love with her at first sight. Chandu starts spending time with Ritu to impress her, but Siri feels that she is being avoided. Siri decides to leave for a dancing School at Chennai. Meanwhile, Ritu accepts Chandu's love proposal. When Siri is about to leave, Chandu apologises her that he had not noticed that she was being avoided. At the same time, Uday comes back from US to surprise her. Hence, she decides not to leave.