This is a real life story of toyato sunny mathew but why it is not mentioned.in fact the sparks are in very smart script( by the writers of kahaani) .
The script tell you the political background( including indias unstable govt at that time.
The way international diplomacy works, the risk-avers ministry of external Affairs, all in a taut 2- hour screenplay which is not without some biting humour.keeps you engrossed, more of the same place.And hats off to Director menon, Akashay, Belawadi and the aforementioned scriptwriters.