The main protagonists Siva (Jiiva) and Sakthi (Anuya) meet on a train from Coimbatore and strike up a conversation. Siva introduces himself as an army officer and Sakthi as an air hostess. They part ways on arrival in Chennai, but Siva promises to meet her soon.
Having fallen for her at first sight, he pays a visit to the airline company where Sakthi claimed to work, with his mother Kalyani and best friend Vivek. On asking for Sakthi, they are greeted by another woman with the same name. Siva realizes that he has been tricked, swearing to get back at her, he plans an elaborate ploy.
A series of humorous incidents later, Siva teases Sakthi live on her radio show and gets her in trouble with her father; and she retaliates by tattling on him to his family and using him as a driver. Assuming Siva to be a prankster, Sakthi does not allow herself to consider him more than a friend.
When Siva defeats a handful of goons in a tough fight to save Sakthi’s brother (Sathyan) and helps organize his marriage, Sakthi develops genuine feelings for him. What follows is a tumultuous journey that the couple traverse through; where honesty, fidelity, trust and love are put to test.