Banglar Badhu' is the story of Mala who stands up against all odds to bring back her husband Raja from the wrong path. She is supported by her mother-in-law and sister-in-law Sunita in her efforts. Raja's brother-in-law Gokul wants to ruin the family and usurp the property. He causes the death of raja's mother and also kills Purnima. Raja is jailed but Mala exposes him and fights against him. Gokul is finally arrested.