The film marked Pradeep Sarkar's directorial debut and Vidya Balan's Bollywood debut.
The film was made on a tight budget but it did well on the box office.
The movie starred Neil Nitin Mukesh and Deepika Padukone in the lead roles.
It featured Rani Mukerji as Shivani Shivaji Roy, a policewoman trying to uncover secrets of human trafficking.
It featured Kajol in the lead role as an aspiring singer and single mother.