Director: Mohan Raja
Cast: Sivakarthikeyan as Arivu, Fahadh Faasil as Adhiban Madhav aka Aadhi, Nayanthara as Mrinalini aka Miru, Prakash Raj as Kasi Annan, Sneha as Kasthuri, Thambi Ramayya as Stella Bruce, and Vijay Vasanth as Bhagya.
Arivu hails from Kolaikkara Kuppam a.k.a. Cooliekkara Kuppam a slum area in Chennai. He is one such responsible youth, who wants to focus on the upliftment of his fellow beings and he works hard for the same. Arivu starts Kuppam FM 90.8, a local radio channel with the help of the area gangster Kasi.
In reality, Arivu tries to free the people of the area from the atrocities of Kasi, who is deliberately preventing them from becoming independent, so that he may continue to dominate the area. Arivu succeeds in turning the people of the area against Kasi, thus destroying his support.
Later, Arivu joins a leading FMCG company, Saffron and joins its sales department under Stella Bruce. He also manages to bring his friend Bhagya out of Kasi's gang and gets him a job in Saffron. He meets Aadhi, the Brand Manager of Saffron, who teaches him how to progress by doing smart work and Arivu considers him as his inspiration.
On the night of 1 April, Kasi and his gang attack Bhagya and brutally stab him in Saffron's godown, whereupon he dies in the hands of Arivu. Arivu filled with rage, tries to attack Kasi. But, Kasi's rival Doss (Sharath Lohitashwa) attacks and brutally stabs Kasi in retaliation for their previous encounter and Arivu admonishes Kasi for being such a paid henchman. But Kasi tells him a stunning truth. What is the truth and how Arivu avenges his friend and bring justice form the rest of the story.
The movie is a box office success and established Sivakarthikeyan as a star hero. The performances of the lead actors and the support cast, and Mohan Raja's direction received praise.