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Ashwin (Jeeva), a young, energetic photojournalist working for the private newspaper "Dina Anjal", witnesses how Naxalites rob a local bank. He manages to take photos of the robbers and while escaping, is stopped by a young woman (Karthika Nair) who mistakenly assumes he is the culprit and helps the robbers take his camera. However, he is able to secure the Memory Card of the camera and to verify that he is a press photographer. He shows the photos to the police, who identify everyone except the gang leader, who is masked. At his office, he meets Renuka, the woman who earlier mistook him, who turns out to be the new Article Editor. Saraswathi (Piaa Bajpai), also working in his office, has a crush on Ashwin.
　　Vasanthan (Ajmal Ameer), a young freshly-graduated engineer, strives hard to enter the political field. He faces stiff competition with his rival political candidates, the current Chief Minister Yogeswaran (Prakash Raj) and the Leader of the Opposition Aalavandhan (Kota Srinivasa Rao) who buy votes at the time of elections by giving freebies and money circulation processes. No one cares about Vasanthan and his youthful team of graduates, named 'Siragugal' ("Feathers") who promise a healthy government to people.
　　Meanwhile, Renuka writes a cover story about Aalavandhan, stating that he is attempting an illegal minor marriage to win the elections as suggested by a priest. Flamed by this, Aalavandhan barges into the newspaper office and verbally attacks Renuka, who is unable to defend herself as the witness whom she interviewed does not support her story and her audio recording of the interview is erased by Aalavandhan's men prior. The publisher appeases Aalavandhan by offering to run a detraction and public apology in the newspaper the following day while dismissing Renuka for smearing Aalavandhan's reputation.
　　However, that same night, as the dismayed editor types his resignation letter and prepares to clear out his station, Ashwin sends him the incriminating photographs of Aalavandhan, who in truth, was committing an act of minor marriage. With this new infallible evidence, the story appears in the following day's issue, reclaiming the reputations and jobs of the editor and Renuka. For his selfless deed of saving her reputation and beloved career, Renuka falls in love with Ashwin. Saraswathi eventually comes to know that Ashwin loves Renuka as well and unites them both happily.
　　Elsewhere, through some events, Siragugal garners increasing support from the public. Vasanthan organizes a party rally at an outdoors arena. While shooting the campaign, Ashwin receives a text message from Saraswathi stating that there is a bomb underneath the stage. Ashwin manages to save Vasanth and Renuka, while he finds a seriously injured Saraswathi fighting for her life amidst the stampede, but eventually succumbing to her injuries.
　　Ashwin, through a video clip recorded by a cameraman, finds out that Saraswathi was choked to death in the chaos of the bomb blast. Through his photograph collection, he later notices a resemblance between the leader of the bank robbery and this unknown killer, and pieces together that both are the same person and a Naxalite (Bose Venkat). Meanwhile, Renuka discovers that Ashwin and Vasanthan are college mates. While she questions Ashwin about this, he reveals that he, Vasanthan and other collegemates believed Vasanthan's political aspirations would bring brilliant, passionate and efficient youth to office and ameliorate the governance of the state. To this end, he had aided Vasanthan by portraying his selfless acts and the self