(Released: Feb 6, 2015)
Daanish (Dhanush) is a cinema-obsessed small town kid who was born dumb and is desperate attempts to become a star, despite his handicap. During his struggle he comes across assistant Director Akshara (Akshara Haasan) who decides to help him realize his dreams and thus puts him through her doctor uncle, who in turn, suggests a certain technological breakthrough in medical science through which a dumb person can actually speak! But the only condition is that the voice won't be of his own but of another person. After many a vocal auditions, it's finally the drunkard Amitabh Sinha (Amitabh Bachchan), whose voice Akshara and Daanish choose. The deal is signed with Amitabh which states that he will have to remain silent about all this and not utter a word to anyone, against which he will be paid handsomely for being Daanish's voice. Daanish, who then, rechristens himself as Shamitabh goes on to become an overnight sensation with a voice to match. Thus starts his journey into the skies. It is during this journey, when success actually goes into his head that he starts dictating terms to Amitabh, who also starts suffering from the same ego issues as Daanish. Amidst these clashes, there arrives a journalist who gets his hand on the much guarded secret about Shamitabh's truth.
Does the journalist become successful in exposing the truth behind the real 'Shamitabh', who amongst the two (Daanish and Amitabh) agree to compromise with the other, where does the duo's ego clashes leave Akshara who is working really hard on her directorial debut with Shamitabh as the lead, does the world ever get to know the decoding of Shamitabh... is what forms the rest of the film.