Ashfaque (Ajay Devgan) is a small town boy aspiring to be a film star in the Hindi film industry. He joins a street theatre group run by a reformed Dacoit Siddhu (Pankaj Kapur), who uses street theatre as a medium to bring about an awakening in the masses. Ashfaque struggles to give a creative vent to the actor in him in order to realise his dreams. Ashfaque's determined struggle pays off and he gets a break in films and a new screen name - Sameer Khan. Lady Luck favours him, and soon he is Sameer Khan the superstar - one who can enact any role with finesse, get under the skin of any and every character with ease, and walk away with audience applause. Sadly, amidst all adulation and applause, he slowly loses his own identity. He forgets his real self. Corruption takes over his entire system, alienating him from all loved ones, including his wife Sneha (Vidya Balan). A shocking incident at a party changes everything, shattering Sameer Khan's complacent world. He's caught between his conscience on one side, and his stardom and success on the other. Whether the conflict within him gives way to good sense, and whether he is able to discard his corrupted image and emerge as a true life hero, becomes an integral part of this true life cinema. It is a story of a reel hero becoming real hero.