The film is narrated in a nonlinear plot. In 1993, in Srivilliputhur, Raghu and Dhanasekhar were schoolmates and best friends. Dhanasekhar lived with his parents and little sister Bharathi, while Raghu lived with his bedridden mother. One day, Raghu's mother died, and his uncle had to take care of him. Thereafter, Raghu had a riding accident because of Dhanasekhar and lost his vision in the process. The school teacher and Father, Joseph Aruldoss, who was also Raghu's mentor, enrolled him in a special school. Dhanasekhar's father then got a transfer in a new city, but before leaving Srivilliputhur, Dhanasekhar met the blind Raghu and said goodbye to him. Afterwards, Joseph Aruldoss taught Raghu to play the violin. The years passed, and Raghu has his sight back. In Chennai, Raghu is now a reputed violinist in the cinema industry. He is married to the talkative Gayathri, and they have a daughter Bharathi. Gayathri spends her time scolding her husband Raghu for his sudden strange silence. Raghu has sent hundreds of letters to Bharathi, but the letters never reached her. One day, the restraint Raghu suddenly packs his bags and leaves home, leaving his wife in shock. He takes a bus to Kanyakumari. A few years ago, in Kanyakumari, the blind Raghu found Dhanasekhar and his sister Bharathi, who had just lost their parents. Bharathi developed a soft corner for Raghu and she eventually fell in love with him. Bharathi even encouraged Raghu who played the violin in the church to try his luck in cinema. Bharathi then told Dhanasekhar her wish to marry, and he accepted. One day, Dhanasekhar had a severe accident and died but not before telling Raghu that he donated his eyes to him. Persuaded by the pleas of Joseph Aruldoss and Bharathi, Raghu reluctantly accepted for the eye transplant. However, after the operation, Raghu mysteriously vanished, leaving his astounded lover Bharathi in tears. Back to the present, Gayathri finds out that Raghu was a blind person who can die at any moment due to the injury that he sustained in the past. Gayathri and her daughter Bharathi decide to go to Kanyakumari. Meanwhile, Raghu comes to Kanyakumari in search of Bharathi. However, he cannot find her and instead meets Joseph Aruldoss at the church. An angry Joseph Aruldoss scolds him for betraying the poor Bharathi. Raghu explains to him that after the operation, he had a part of Dhanasekhar in him and could not marry Bharathi, who also became his sister in the process. Raghu also tells him that he feels guilty of what he did and cannot live any longer without apologizing to Bharathi. When Raghu finally sees Gayathri in a nun's dress, he faints and dies. Gayathri and her daughter then come to church and mourn the death of Raghu. The film ends with the newly widowed Gayathri writing a letter to Bharathi.
Lena Moovendhar, a former associate of J. Mahendran who directed television serials, made her directorial debut with Kannukulle under the banner of SS Pictures. Mithun Tejasvi was selected to play a violinist, while Aparna Pillai returned after a brief interval to play the female lead. Newcomer Anumol played the second heroine, whereas Sarath Babu was also in the cast. The director said, "Ilaiyaraaja was so impressed with the story that he involved himself completely while scoring the re-recording. He was moved to tears after watching the climax. We have used 30 violins to score music for the climax".
Soundtrack
The film score and the soundtrack were composed by film composer Ilaiyaraaja. The soundtrack features 6 tracks.
Release
The film was released on 25 September 2009 alongside four other films.
Critical reception
said, "Kannukulle has a plot with the potential to turn into a different and an emotion-packed entertainer. If only the debutant director had worked his script in a more coherent and convincing way". S. R. Ashok Kumar of The Hindu praised the acting of Aparna Pillai, Yugendran, Sarath Babu and Shanmugarajan, and Ilaiyaraaja's music. He also added, "newcomers Mithun and Anu reveal their inexperience as they obviously struggle to cope with the screenplay, which is by the director".
Box office
The film took a below average opening at the Chennai box office.
