Though love themes majorly deal with the phase of attraction and relationship between two young hearts and the familiar yet tiring battle through prejudice and family opposition, each is driven by a different daemon. Kadhalil Vizhunden deals with an intense love affair and also proceeds to discuss the hero's perspective towards the whole issue.

Sabha (Naghulan) has had a tough and troubled childhood. His experience in dealing with his drunkard father and all the torturous episodes with him make him feel alone and deprived of true love. Moreover, the rough life also causes a dent in his psyche and inculcates a feeling of insecurity and self-doubt. Propelled by these negative tendencies, sensitive Sabha thrives on daydreaming and pushes through life more on doubt than on certitude. An accomplished basket ball player, the frequent matches break him away from his habitual brooding and they are his only source of entertainment.

Exactly at this juncture, Meera (Sunena) enters his life like a whiff of fresh air. With her around, Sabha recognizes a positive energy and support. After an accident which lands him in the hospital for a few days stay, Sabha also gets to chance to witness Meera's humanitarian side. Prodded by the fascinating aspects of her personality, Sabha falls in love with Meera and hopes that she will fill up the void in his life.

Meanwhile, Meera too develops a liking towards Sabha. Except a nagging uncle (Hariraj) who is forever bent upon grabbing her massive assets, she too has no family connections to fall back on. Sabha's unassuming personality charms her. When both of them warm up to the affair, Sabha leaves town to play a crucial match and when he comes back, Meera is dead.

The news comes as a shock to the young man. Moreover, the mind-boggling speed at which things had taken place in his absence makes it impossible for him to assimilate its full magnitude. Dazed and driven by a maelstrom of confusion and loss, Sabha kidnaps his lover's dead body and preserves it in his abode. Subsequently, Inspector (Sampath) and Meera's uncle chase Sabha and threaten him to surrender. Unruffled by the commotion going around him, Sabha settles into a delusion that his lover is still alive and sets up a routine with the corpse. However, eventually he discovers the truth behind Meera's death. What is the truth? What does he decide to do further? How does he extract his revenge? Does Sabha get a chance to shake off his delusion? Kadhalil Vizhunden's climax reveals everything!

Kollywood audiences have seen so many movies with a psychosomatic twist. But debutante director Prasath has offered his film a touching angle. The film's dialogues and its sequences progress at a very realistic pace and wrap the audiences in its natural charm. Vijay Antony's music has already become a raging sensation among the country's youth. The 'Nakka Mukka' song is virtually on everyone's lips. Vijay Milton's camera adds a youthful touch to the film. Boys' hero Naghulan's involvement in Kadhalil Vizhunden is pretty much evident. The tremendous physical makeover is the first and foremost proof for it; From the chubby immature adolescent in Boys to a fit, handsome and sensible young man in Kadhalil Vizhunden, the fledgling hero makes a strong impression. Apparently, Naghulan has also made the transition felt in terms of his performance. Heroine Sunena too has matched her performance with that of Naghulan. Kadhalil Vizhunden is the maiden venture of Sun Pictures, a well-known broadcasting media conglomerate into the film production realm. Incidentally, their first step has also turned out to be a huge success.

Through its distinguishing story and treatment, Kadhalil Vizhunden has indeed sowed a fresh seed of inspiration in Kollywood.