Two sisters who portray the life cycles in a red light district are separated in the elder one's attempt to clean up life for the younger one. Anu faces womanhood in it's extreme cycles amidst the glow of light in an infamous red light area Sonagachi of Kolkata.
Ayesha her twelve year old sister is smuggled out and turns into an educated and civilized product of society, unaware of her past. Twleve years later, Ayesha tracks her roots along with her boyfriend Rajat, to finally confront Anu and her husband Ranjit, who resists her attempts in convincing Anu to walk out.
Ayesha pens this triangular struggle of the two sisters with life and that is what becomes the best seller.