| Box office | ₹120 crore |
|---|
Chakaravarthi, a famous Film Director, is desperately trying to make it to Best Engineering College in Coimbatore from Munnar. As Chakaravarthi drives, he narrates the story of his school days and his college days.
During Chakaravarthi's school days, Chakaravarthi's father, Ganesan, is very strict who cares a lot about Chakaravarthi's studies and Ganesan wants Chakaravarthi to become a civil engineer. But Chakaravarthi hates studying, he fails in examinations and he lies to his father about his examination marks. At the same time, Chakaravarthi falls in love with Angaiyarkanni. Initially, she avoids him but soon she reciprocates his love. However, they both go their separate ways after Ganesan and Angaiyarkanni's father confront Chakaravarthi's and Angaiyarkanni's relationship since Chakaravarthi claims Angaiyarkanni is just his friend to avoid his father bashing him up.
Chakaravarthi joins Best Engineering College in Coimbatore. However, the Best Engineering College's Disciplinarian Professor, Bhoominathan, whom the students fear and hate, ruins his expectations of enjoying college life. Chakaravarthi constructs a plan to send Bhoominathan away to be a visiting professor at St. Paul's University in Russia so that students can be happy. This earns Chakaravarthi nickname of "Don" of the Best Engineering College. Meanwhile, Chakaravarthi meets Angaiyarkanni again, who is also a part of Best Engineering College in Coimbatore. Angaiyarkanni's best friend Lilly, a first-year student, despite Chakaravarthi's attempts to woo Angaiyarkanni. Lilly explains to Chakaravarthi that, after the incident happened between Chakaravarthi and Angaiyarkanni in their school days, Angaiyarkanni's father stopped talking to Angaiyarkanni.
Chakaravarthi successfully patches them up after creating a short film and ends it on an emotional note with Angaiyarkanni's father and Angaiyarkanni reconciling. Angaiyarkanni is impressed and reciprocates her feelings. Amidst this, Bhoominathan unexpectedly returns from Russia after 2 months and Bhoominathan discovers that Chakaravarthi sent him Russia. In revenge, Bhoominathan's assistant photographs clicks photo of Chakaravarthi and Angaiyarkanni at the Taj Mahal. Bhoominathan uses it to complaint to Killivallavan, the Best Engineering College's Chairman. Chakaravarthi, in return, presents a photo of Bhoominathan and Swetha Miss at the Taj Mahal. It gains the wrath of Killivallavan, who is disappointed in Bhoominathan.
Meanwhile, Ganesan discovers the truth about Chakaravarthi, including his College Examination Marks. Feeling cheated and enraged, Ganesan slaps Chakaravarthi in front of everyone at the Best Engineering College. Chakaravarthi ventures into filmmaking by attending a short film competition. However, Ganesan does not allow Chakaravarthi to do filmmaking and Ganesan wants Chakaravarthi to do civil engineering. Chakaravarthi secretly films portions of the Best Engineering College with his cameraman Perusu. At the film's climax, Bhoominathan finds out about his secret filming. In a mix of guns, drama, and confusion, Bhoominathan suffers an accident that severely injures his neck, but Bhoominathan eventually survives. Killivallavan dismisses Chakaravarthi from Best Engineering College.
Ganesan discovers Chakaravarthi's secret filmmaking and he destroys his short film, resulting in an intense conflict between Ganesan and Chakaravarthi. Frustrated with Ganesan, Chakaravarthi leaves the house. Ganesan later dies due to depression. Bhoominathan gradually recovers while Chakaravarthi prepares another short film for the competition. Bhoominathan and Chakaravarthi develop a positive rapport. Bhoominathan tells Chakaravarthi that he spoke with Killivallavan. Killivallavan informs Chakaravarthi that if he clears all of his arrears, he can get his civil engineering degree, thus burying the hatchet and ending their conflict. Chakaravarthi's short film gets shortlisted to the top and becomes a successful feature film. The film, "Untold Love", is about Chakaravarthi's emotional bond with Ganesan. Chakaravarthi realises that Ganesan cared about him before he died. Later Chakaravarthi and Angaiyarkanni gets married.
In the present, Chakaravarthi is desperate to get his civil engineering degree from Bhoominathan; that is the only reason to attend college. Chakaravarthi accepts and takes his civil engineering degree from Best Engineering College. Chakravarthi then delivers an emotional speech to the students and audience. He also sees a vision of Ganesan applauding. Chakaravarthi is added to the Proud Alumni list at Best Engineering College, which was something Chakaravarthi jokingly asked Bhoominathan in his earlier college days.