New Delhi, Feb. 10 -- Filmmaker Rakeysh Omprakash Mehra's 'Mere Pyare Prime Minister' deals with the sensitive issue of open defecation in India by narrating the story of an 8-year-old whose dreams of building a toilet for his mother lands him in front of the Prime Minister's residence.

The trailer, which came out on Sunday, gives a sneak peek into the plot of the film which follows the journey of Kanhu, a slum boy, who, after his mother is raped by an unknown person, decides to write a letter to the Prime Minister.

Kanhu loves his mother Sargam, played by Anjali Patil, and does odd jobs to contribute to her income. In one scene, he can be seen selling condoms on the streets.

The trailer starts on a lighter note but takes an emotional tu...