Set in the city of Kolkata during the festivities of Durga Puja, Kahaani follows the life of a pregnant woman, Vidya Bagchi (Vidya Balan), in search of her husband, a man whose existence is denied by the people she encounters.
Berlatar belakang kota Kolkata pada perayaan Durga Puja, Kahaani mengisahkan kehidupan seorang wanita hamil, Vidya Bagchi (Vidya Balan), dalam mencari suaminya, seorang pria yang keberadaannya disangkal oleh orang-orang yang ia temui.