Arun (Siddharth) and Parvathi (Amala Paul) give an interview about their love story. But they fight even before the interview gets over. Then the movie rewinds 5 months earlier. Arun meets Parvathi in a college canteen. Soon they become friends. Parvathi's mother, Saroja breaks up with her husband Akilan. Parvathi lives with her mother. As time progresses, they break up but the reason is not revealed. Arun's friend Vignesh tries to propose his junior Rashmi.

But Rashmi address's Vignesh as brother and she introduce her lover who is Vignesh's senior. Arun tries to recover from the break-up. Arun's friend calls him to a trip to Pondicherry to see his friend John.Cathy starts friendly chat with Arun. Cathy wishes to help Arun and asks him why they broke up. Arun says that he doesn't have any reason and that is his problem. Since Cathy becomes friendly with Arun, Misunderstanding crops up between Cathy and John.

Meanwhile Akilan approaches Prabhu for divorce. Prabhu who is Arun's father advice Akilan to reunite with Saroja after knowing that Akilan is Parvathi's Father. Akilan and Saroja unite in Parvathi's grandparents 60th marriage. Consequently, John realise that Arun and Cathy are just being friendly and he reunites with cathy. While Rashmi realise that her lover (vignesh's senior) is a playboy, she realises this and tells this to Vignesh and accepts his true love. At last, Parvathi and Arun reunite after a silly quarrel in the same canteen that they met earlier.

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