Kahaani is a 2012 Indian Hindi-language mystery thriller film it was co-written, co-produced and directed by Sujoy Ghosh. It stars Vidya Balan as Vidya Bagchi, a pregnant woman searching for her missing husband in Kolkata during the festival of Durga Puja, assisted by Satyoki “Rana” Sinha (Parambrata Chatterjee) and Khan (Nawazuddin Siddiqui).
Kahaani was released on 9 March 2012. The film was earned ₹1.04 billion worldwide in 50 days. The film won several awards, including three National Film Awards and five Filmfare Awards.
The film was shot in 64 days, and the filming took place on the streets of Kolkata during Durga pooja
Vidya Balan was the first choice of both writer Advaita Kala and director Sujoy Ghosh. Ghosh had planned for a long time to work with Vidya and approached her in 2010. Later A sequel, was released on 2 December 2016 titled Kahaani 2: Durga Rani Singh
Before the shooting of the film began, Vidya started to use a prosthetic belly to look as close to authentically pregnant. According to the news reports, she met doctors and pregnant women to learn about the typical lifestyle and nuances of a pregnant woman, and also made lists of rules and superstitions followed by pregnant women.
Story of girl Vidya Bagchi playing the helpless, who has arrived from London to Kolkata in search of her missing husband Arnab. With a sympathetic cop helping her on this mission, Vidya search every corner of Kolkata. But all leads go cold – the guest-house he was staying at, the National Data Center where he’d been assigned, even the Indian immigration authorities have no records of Arnab Bagchi. When it seems like her husband’s disappearance might be linked to a most-wanted terrorist, Vidya pokes her nose around in dangerous places, angering the Intelligence Bureau that is trying desperately to keep some secrets hidden.