Dhil is the story about Kanagavel (Vikram) whose only dream is to become a police officer. He succeeds in passing the exams and wins a girlfriend (Laila). One night after having dinner at a restaurant near the beach Velu goes to pay the bill leaving Laila behind. At that moment a corrupt police officer Shankar (Ashish Vidyarti) drinks and urinates besides Laila. Irritated, she scolds him. He attempts to rape her but is beaten up by Velu severely and receives a scar on his face. Angered by this he seeks revenge against Velu.