Bumboo - the name of the film itself should give you an idea what it is all about. In local language, to "bumboo" somebody is to make his life hell, literally. Another commonly used phrase that conveys the same meaning is "waat lagana".
And so, as the narrator says in the beginning, the story is about how one person makes another's life a living hell. Manu Gupta (Sudhir Pande), who has been arrested for a Rs. 12.5 crore scam, has been arrested by the Inspector (Major Bikramjeet Kanwarpal), and is on his way to the Goa Court to reveal names of his associates.