BANGISTAN begins with the ‘demographical introduction’ of a fictitious country named ‘Bangistan’. The country is divided into two parts with North Bangistan occupied by Muslims while South Bangistan occupied by Hindus. As the name suggests, the country is full of people who believe that the only way to bring peace to the world is by the means of violence and the south and the north are always at war with each other.
On the other hand, the focus shifts to a video conferencing call between religious heads of Bangistan, Imaam (Tom Alter) and Shankaracharya (Shiv Subramaniam), discussing about the upcoming ’13th World Religious Conference’ that is to be held in Poland. There happens the introduction of Hafeez Bin Ali aka Harold (Riteish Deshmukh), who quits his job at a call centre after a certain ‘religious backlash’. He then gets handpicked by the chief of ‘Al-Kaam Tamaam’ to represent their outfit and to become a suicide bomber to blow up the peace conference. In order to avoid being ‘recognized’ by anyone, he completely metamorphoses into a Hindu as ‘Ishwarchand Sharma’. On the other hand, there also exists a struggling actor Pravin Chaturvedi (Pulkit Samrat), a devout Hindu and also a follower of the religious Hindu outfit ‘Maa Ka Dal’. He too gets handpicked by the leader of ‘Maa Ka Dal’ in order to double up as a human bomb at the peace conference. Just like Hafeez, Pravin too undergoes a completely metamorphosis, the only difference being that he disguises himself as a Muslim under the name of ‘Allah Rakha’.
Destiny makes the duo meet each other not only at the airport on reaching Poland (where they strip themselves to their bare minimum on ‘humanitarian grounds’), but also end up as neighbours. Noticing how much they respect each other’s religion and how similar they are, the duo become close friends in an alien country … until one day Pravin discovers (read ‘uncovers’) the real motive of Hafeez Bin Ali. What happens to their ‘friendship’ after this discovery, does the duo succeed in bombing the religious peace conference is what forms the rest of the film.