There are four friends, and another one. The another one is an airforce pilot who gets killed in one of those MiG-21s. The defense minister is supposed to be responsible for buying crappy products for those flying machines but he throws aspersions on the another one's ability. The friends protest this when the police break up their heads and puts the pilot's mother into coma. All these happen after they get all patriotic after 'acting' in a movie made by a colonial policeman's grand-daughter.
The saddest part of the movie was when these four friends were compared to the freedom fighter Bhagat Singh and his friends! They died for a reason - to take revenge on General Dyer, the Butcher of Amritsar. These four die only because their friend died. Never mind they vandalising national monuments, bribing policemen, endorsing coca-cola, etc.
Fortunately, no one got jingoistic during/after this movie, as it happened during Mangal Pandey.