Mani Shankar who established himself with 'December 16' and then went on to 'Rakht' and 'Tango Charlie' brings forth the story of an informer. Mukhbir is the story of those people who work as honest and dedicated informers for the intelligence department but their story always remain behind the curtain.
Om Puri arrests Kailash (Sameer Duttani), a nineteen year old antisocial but looking at his innocent face Om Puri advices him to become an informer for them so that his offences can be forgiven. Kailash accepts the approach in order to save his life. Om Puri slowly becomes a father figure for Kailash and he starts calling him Babuji and wife as Maaji.
On the other hand Kailash continues with his job of informer so that he can earn twelve lakhs rupees to wave adieu to the world of crime forever. Due to an operation in Hyderabad, Kailash has to get into the character called Vinayak Marathe to enter the gang of Mamu Don (Alok Nath). But Mamu proves to be the don just for the namesake and in reality it's his widow daughter and sharp shooter Pasha Bhai (Sushant Singh) who run the gang. Kailash's mission in Hyderabad is to finish the notorious gangster Mustafa. He accomplishes his job but the situation forces him to kill Om Puri and thus, in the police force, Om Puri's friend Rahaman (Suneil Shetty) comes into the position of Om Puri.
The story forwards and the next step in the mission comes where they have to reach Saaya (Rahul Dev), the boss of Mustafa. To complete this part of the mission, Kailash now has to get into the skin of Shahzad Khan. In this way Kailash enters the gang of Saaya and comes to know that Saaya is going to blast more than twenty bombs in several places of Mumbai in the duration of less than seven minutes. The whole terrorist operation is supported by some foreign power. Kailash informs that to his Maaji and through her the news reaches the Chief Minister (Jackie Sroff) and somehow the blasts cannot take place.
Director Mani Shankar would have wanted his film to take off very much the 'Bourne Identity' way. Though he tried to spin it a little bit here and there by asking the viewers to have pity on the informer or 'Mukhbir', he fails miserably.
As far as acting is concerned, Samir seriously requires much more to look like that informer. His delivery is poor and his expressions are kiddish. Suneil Shetty just walks in and out and leaves no scope for understanding. Om puri does his bit well even though he often confuses. Raima Sen was just a waste. Sushant Singh does his bit of massaging the ladies and getting to do some Bhaigiri. Alok Nath too joins him on this bit.
In a nutshell, the story of Mukhbir bears a striking resemblance to RGV's Contract and that takes away the novelty aspect. Mani Shankar delves deeper in Mukhbir and the outcome is watchable at places, but fails to impress in totality. This film is a weak product. At the box-office, it has dim chances.