Viyabari is an enthralling Tamil-language science fiction comedy film that premiered in 2007. The movie masterfully intertwines elements of drama, comedy, and intrigue, spruced up with the allure of exciting scientific phenomena. The story is penned by the multi-faceted S. J. Surya, who also breathes life into the reel as the protagonist, paired alongside the dazzlingly beautiful Tamannaah.

The narrative unfolds with Suryaprakash (S. J. Surya) a business-minded person who does not see anything wrong in using people to achieve his business objectives. A smart ambitious man from an early age, Suryaprakash basks in his dreams of becoming a rich and successful businessman. Surya's story swings between his past, revealing how his interactions, experiences, and perceptions from his younger years shape him into the man he evolves into. However, he's not your average businessman - Suryaprakash's approach towards business is bolstered by his profound knowledge of an idiosyncratic scientific invention, something that earmarks him from the usual crowd.

A highlight of the movie lies in his relationship with Mumtaj, a rich businesswoman. Their friendship takes on a new dimension when Suryaprakash learns about her ill-health. He decides to go to any length to help her out, even if it means employing his scientific acumen to the forefront, delving into the world of human cloning. The way the narrative pedals on the ethical dilemmas and moral choices of cloning, and how Suryaprakash wades through these obstacles, weaves the crux of the story.

Veering off from the intense premise, the film also interlaces romance, beautifully bringing forth Suryaprakash's relationship with Tamannaah who plays the part of a journalist named Savithri. The lively protagonist wears his heart on his sleeve when he falls in love with Savithri, giving the audience an endearing love angle to invest their interests in. This romantic subplot has been layered with adorable moments, cutting through the seriousness of the primary narrative, thereby giving the audiences small bouts of respite with light-hearted scenes from time to time.

The multi-talented S. J. Surya, known for his depth in his characters and strong screen presence, doesn't disappoint in this film. He sails smoothly running the gamut of emotions - from playing a shrewd businessman, a love-smitten man to a scientific genius grappling with moral conflicts. Tamannaah complements Surya's performance with her perfect mix of charm, gracefulness, and elegance. Their chemistry is undeniable and forms one of the strong suits of Viyabari.

Supporting them is an ensemble cast comprising veteran actors like Seetha, Nassar, and Vadivelu, each contributing to the tapestry of this intriguing tale in their unique way. Vadivelu's comedic timing, in particular, adds some refreshing laughs to the movie, providing a good balance to the intense sequences.

The exceptional narrative is amped up with melodious tunes, composed by the renowned music director Devi Sri Prasad. His soundtrack for the movie is nothing short of masterful artistry. The movie has a balance of peppy numbers and soulful melodies, each song contributing to and aligning seamlessly with the storyline.

As much a visual treat as it is a narrative galore, Viyabari's color-rich cinematography captures the essence of each scene, painting a vivid and lively story with each frame. The scenic locales, distinct visuals, and riveting action sequences significantly enhance the cinematic experience.

Directed by Sakthi Chidambaram, Viyabari stands out as an eccentric blend of commercial cinema coupled with a unique scientific concept. It engages the audience with its entertainment value and its distinctive perspective on cloning, a premise rarely explored in Tamil cinema. This amalgamation of high drama, ethical conundrums, undercurrents of romance, and thought-provoking plot twists come together to create an engaging and unforgettable cinematic experience.

In essence, Viyabari astutely combines humor, romance, ethical dilemmas, and scientific intrigue to create a captivating visual treat. It isn't just about business, but about scientific marvels, human relationships, and the grey areas of morality.