Ever since Sundar. C became a commercial hero, his movies have consistently found spots near the top of year-end Worst 10 lists. There was some hope that his teaming with Sathyaraj would result in an increase in quality, since the movies that Sathyaraj appears, even if no classics, have so far wound up being better entertainers than Sundar's films. Unfortunately, it is Sundar who has pulled Satyaraj down to his level in their outing Guru Sishyan. A disjoint, crude and vulgar film, it is sure to keep Sundar. C's aforementioned track record intact.

Gurumoorthy(Satyaraj), a moneylender, is one of the richest men in Rajapalayam. Eeti(Sundar. C), a rowdy-for-hire, joins his group and earns his trust to quickly become his right-hand man. Guru's favorite target is Mahalakshmi(Saranya). He bristles at the very sight of her and is determined to destroy the lives of her and those around her. But that becomes tougher when she gets a new protector.

The film opens with a segment where Satyaraj mocks the recent Nityanandha scandal while also making jabs at politics and cinema. It then introduces Sundar through a sequence where he cracks lewd jokes directed towards the family of the girl he is going to marry. This sets the tone for what is to come since that is all the two of them end up doing throughout the film - Satyaraj satirizes a lot of things, most of which are easy targets and have been attacked before while Sundar takes part in some crude acts, either with Shruthi or her family, in the name of comedy and romance. So the film is simply a string of loosely connected skits.

The story is simply a clothesline to hang these skits on and hinges on the completely unbelievable plot points of people, at two different points in time, not actually explaining things to Satyaraj and taking some extreme steps assuming his reaction. The screenplay contains several minor surprises and twists but these are either painfully obvious(like the one where Sundar takes Satyaraj to the villain's den) or require convoluted explanations through confusing flashbacks. Characters appear and disappear; become friends or turn enemies; show loyalty or cheat all by the whims of the screenplay and then reveal plans that are supposed to explain all that but just end up confusing us.

The film casts Satyaraj and Sundar as friends for some time and then foes for the rest of the film. While they indulge in their aforementioned shticks as friends, their time as foes is marginally more interesting even if the games they play with each other are amateurish and simplistic. But the sequence at a wedding is truly bizarre. Involving a tiger and Santhanam dressed up as a woman, it is chaotic, silly and involves a truly gross-out moment borrowed from American Wedding.

Sathyaraj looks quite bored and disinterested as he goes through the motions taking potshots at all the topics. Sundar.C shows more energy as he does his usual shtick, which has already gotten repetitive. Shruthi, billed as Namitha's replacement, looks like she has borrowed Namitha's clothes for the song sequences and has little else to do. Saranya is the movie's only saving grace and the sequence where she acts as if she's possessed and leads the people to Sundar's house is the sole funny one in the entire film. Santhanam follows Sundar's lead, shouting and cracking double entendre jokes.