Babul Sheikh is a 14 year old from Bangladesh, the son of an ad director, who died in a plane crash. Babul was just a toddler then. Soon enough, the upper middle class family was on the verge of being engulfed and pushed below the poverty line.
Keeping the son in mind and their depleting financial status, Babul's mother decided to remarry. The new husband, like many, subjected the duo to abuse. Agitated, the mother had to divorce him.
This is how Babul came to India. His mother sent him to Kolkata to sell tea leaves and add to the family's meagre income. However, he was found lost and wandering and taken by a certain welfare center. Babul wants to leave from there soon and go to Bangladesh, because
"Aamar shudu aamar Maa
Maar shudu aami "
<I only have my mother, and mother only has me>