Vidya Bagchi (Vidya Balan) arrives in Kolkata from London to find her missing husband Arnab Bagchi. Seven months pregnant and alone in a festive city, she begins a relentless search for her husband. With nothing to rely on except fragments from her memories about him, all clues seem to reach a dead end when everyone tries to convince Vidya that her husband does not exist. She slowly realises that nothing is what it seems. In a city soaked in lies, Vidya is determined to unravel the truth about her husband - for herself and her unborn child - even at the cost of her own life.
Vidya Sinha (Vidya Balan) has only one obsession in life. She wants to see her teenage daughter Mini, who is paralysed waist-downwards, walk again. But, is this scenario as obvious as it seems? Or is Vidya an impersonator of Durga Rani Singh from Kalimpong, who is wanted for kidnapping and murder?
A couple lives though three different lives over different eras as destiny conspires to make them fall in love with each other, against all odds.