Guddu Ki Gun is a comedy that promises to be a crazy, mad, totally tripped out ride. It follows the tale of Kunal Khemu who plays Guddu Bhaiya, a charismatic washing powder salesman in Kolkata and who is flirtatious by nature. He has a soft corner for beautiful Bengali Housewives. He roams in the town with his friend Laddu, and openly flirts with the married women of the town. Everything is good with Guddu, until one day, he is cursed by a woman's grandfather in whose house he was having sex due to which his manhood turns to solid gold! Suddenly, everyone wants a piece of Guddu. Things get interesting when the mafia get involved, eager to take Guddu's 'gun'! Now it's upto Guddu to free himself of this curse. Are you eager to watch this Bihari Casanova who believes that the quickest way to a woman’s bedroom is through the bathroom?