This is the 1957 Bengali movie directed by Tapan Sinha and based on Rabindranath Tagore short story. There was a later Hindi movie made in 1961 starring Balraj Sahni. This Bengali movie won the National film award for the best Bengali film. Its a very powerful and moving story of an Afghan trader who comes down to India to trade his wares leaving behind his family in Kabul. He has a daughter of about 5 or 6 years old, whom he misses very much. So when he espies a similar looking 5 year old kid in Calcutta, he becomes very attached to the kid. He gets booked in an assault case and has to spend 8 years in jail before he is released and goes back to find that same 5 year old kid, who has now grown up to be a marriageable girl. Very emotionally gut wrenching movie towards the end. Its a simple story said in a simple style and directed very well. The music by Pandit Ravi Shankar is exemplary throughout the movie.