The effects of Bhang is such that whoever consumes it can be under its influence for days , without having any knowledge of what they have done during that period. This what is consumed by the protagonists Ram, Nisha, Ravi, Sagar and Sudeepa on the festival day of Holi, post which they decide to visit every house to play Holi. They also realize that once under the influence of Bhang they will be unable to drive the SUV and hence take along with them their partner in crime, Pandey their hostel warden, who happily consents unaware of the consequences he is about to face.
As decided, they visit every house in the village and do some kind of mischief in every home they visit. They go to the extent of rubbing the families the wrong way, that the families are after their blood for their mischief.
As expected, the protagonists are unware of they have done to people that they are after them. They have no clue when they captured terrorists or how it happened. They also wonder why Sudeepa's and Sagar'sf amilies are after them with weapons. To top it all, they had also somehow managed to free Pandey's ex-girlfriend from her in-laws house to unite her with Pandey, which puts Pandey in a fix as he is unable to answer his wife or daughter about the episode.
Once in their senses, they start looking for answers for all the puzzles and the tribulations that they have got themselves into. When they seek their answers from their warden Pandey, the earth moves under their feet. They get dumbstruck by their actions under the influence of Bhang. The Bhangover changes their lives forever.