Big Brother is a story set in today's India. It starts in the Capital City of India and travels to Mumbai and the effect of the events that unfold is felt all over the world. It is the story of a small middleclass family comprising of Devdhar (Sunny Deol), his mother (Farida Jalal), brother and sister.
Leading a very simple and peaceful life, an incident just turns their life upside down and the family is left with no other option but to leave the city and move onto Mumbai under a different guise. They start life afresh and all seems well till the ghosts of the past surface again.
Things reach a point when our protagonist Devdhar is prodded by his mother to take that course of action which not only avenges their hurt but also takes on the cause of the aggrieved in the country as a whole. The movement so created gets the support of the girls and ladies who proudly proclaim him to be as their Big Brother.