Don

Young Chakaravarthi lives under his strict father Ganesan, who pushes him to become a civil engineer. He hides his true grades and lies about his test scores to keep his father from losing faith. His sole aim is to secure a college education that will please his dad.

Chakaravarthi falls for Angu, who initially avoids him but soon reciprocates. Their romance is complicated by concerned families and misunderstandings. To avoid anger from his father, he later claims Angu is only a friend.

Chakaravarthi enrolls at Best Engineering College in Coimbatore, where he faces Bhoominathan, a feared disciplinarian. The campus life looks bleak until he begins plotting changes. He still hopes to prove himself.

He crafts a plan to send Bhoominathan to Russia as a visiting professor, hoping to lighten the campus mood. The scheme earns him the nickname Don among the students. The move intensifies the power struggle at the college.

Angu befriends Lilly, a first-year student, while Angu herself grapples with her strained relationship with her father after a school incident. Chakravarthi continues to pursue Angu amid college drama. The threads of friendship and love intertwine.

Chakravarthi creates a short film that helps patch things up with Angu's father, leading to a fragile reconciliation. Angu's feelings grow as the bond between them deepens. The emotional tone hints at a hopeful future.

Two months after leaving, Bhoominathan returns and learns that Chakravarthi was behind the move. He seeks revenge, and his assistant secretly photographs Chakravarthi and Angu at the Taj Mahal to use as leverage. Killivallavan is drawn into the ensuing conflict.

Chakravarthi retaliates by producing a photo of Bhoominathan with Miss Swetha at the Taj Mahal, which angers Killivallavan. The executive’s wrath escalates the college’s internal conflict. The diplomacy fails and tensions rise.

Ganesan discovers the truth about Chakravarthi's test scores and confronts him with anger, even slapping him. The father-son rift widens as Chakravarthi continues to chase filmmaking dreams in secret.

Chakravarthi secretly films portions of the college with Perusu for a new short film. Bhoominathan uncovers the secret, leading to a chaotic confrontation that ends with a neck injury to Bhoominathan, from which he eventually recovers.

Killivallavan dismisses Chakravarthi from the college after the chaotic events. Ganesan discovers the secret filmmaking and destroys the short film, triggering an intense confrontation that drives Chakravarthi to leave home. The family fracture becomes permanent for now.

Ganesan dies after the fallout, while Bhoominathan gradually recovers. The experience for Chakravarthi shifts toward forgiveness and reconciliation with his mentor.

Chakravarthi's short film finally gets shortlisted and grows into a feature film, Untold Love, achieving major success and revealing his emotional bond with Ganesan. The recognition offers a new path toward finishing his engineering degree.

Amid the rising success, Chakravarthi marries Angu, solidifying the personal turn of his life. The couple binds through shared dreams and forgiveness. The ties with Angu complete the romance arc.

In the present, Chakravarthi attends college solely to obtain his engineering degree. He delivers an emotional speech to students and receives a vision of Ganesan applauding. He is finally added to the Proud Alumni list, closing his journey with a nod to his father.