Babu Bihaari (Nawazuddin Siddiqui) is intimidating, wicked, reckless, flamboyant in his own realm and one hell of a badass political-contract killer, who kills his targets not only because someone paid him to do it, but because he enjoys killing people in his own style. Once, while on the mission to kill some he met Bidita bag and eventually fell for her! Meanwhile, his dominance over contract killing business is challenged by Bankey Bihari (Jatin Goswami), a competitor who claims to be his fan but wishes to take over Babu Bihaari! Added to his troubles, he is pulled into labyrinth internal politics, which end up him facing unfortunate after effects!