A mother's unyielding love for her daughter Neerja, despite living in Kolkata's infamous red-light district, Sonagacchi.

Dulhan is the love story of an innocent, illiterate girl Vidya and a mentally challenged young man Sagar. Vidya, on the night of her marriage, comes to know about Sagar's abnormal mental state of an eight-year old child due to an accident in the past. The story deals with Vidya's struggle in gaining Sagar's love and trust and the hurdles that she faces for the same from Sagar's evil step sister Sindoora.