Ashfaque (Ajay Devgan) is a small town boy who dreams of becoming a Bollywood star. He joins a street theatre group run by a reformed dacoit Sidhu (Pankaj Kapur) but Ashfaque finds it difficult to give a creative edge to the actor in him.
Determined to make his dream come true, Ashfaque's struggle finally pays off when he gets a break in Hindi films.
Now known by his new screen name, Sameer Khan, this lad starts to get better roles with time. In no time, Sameer Khan becomes the superstar.
But amidst all the adulation and applause, he slowly loses his own identity as he forgets his real self.
He takes on the characteristics of the various roles he has played on screen. It is not long before corruption takes over his entire system as he gets alienated from his close ones including his wife Sneha (Vidya Balan).
A shocking incident at a party changes everything, rocking Sameer Khan's lifestyle.
He gets caught between his human self on one side and his corrupted superstar image on the other.
Will the conflict within him gives way to good sense? Will he is able to discard his corrupted image and emerge as a true life hero? Halla Bol has the answers.
Halla Bol (meaning attack) is directed by Raj Kumar Santoshi of the Khakee and The Legend of Bhagat Singh fame.