Kahaani, which was co-written by Sujoy, revolved around a pregnant woman named Vidya Bagchi, who was in search of her husband in the city of Kolkata. The role was effectively played by Vidya Balan. It also featured Parambrata Chatterjee, Nawazuddin Siddiqui, Indraneil Sengupta and Dhritiman Chatterjee
"Mrinal da being a good East Bengali had to have fish all the time. That must have turned her stomach. She used to borrow vegetables and cooking oil from the cook and made her own food on a stove," recalled actor Dhritiman Chatterjee in Smita Patil: A Brief Incandescence, a biography written on the actress
Veteran actor Dhritiman Chatterjee, who began his acting career with Satyajit Ray, believes the legendary filmmaker was in control of every aspect of his craft.