Calcutta-born Sujoy Ghosh left a cushy job to make movies. His debut-making venture, Jhankaar Beats turned out to be a surprise hit in 2003 but it wasn’t until the Vidya Balan-blockbuster Kahaani in 2012 that he proved himself as a master story-teller with a difference. Giridhar Jha speaks to the filmmaker, who now wants to fulfil his long-cherished dream of making a revenge drama with a popular action star.