A fan of Sharadindu Bandyopadhyay's stories since the age of 13, Dibakar said he wanted "Detective Byomkesh Bakshy!" to be his first project but he is glad that he took over the movie only after gaining experience but it was bewildering all the same.
"This film was different from anything that has been done or anything that I have made. We spent sleepless nights agonising over it. It was scary and a different animal and we just wanted to tame it," Dibakar told PTI during a visit here.
The director, known for his interesting take on contemporary issues in "Khosla Ka Ghosla", "Oye Lucky Lucky Oye" and "Shanghai", has set the Sushant Singh Rajput-starrer in the politically volatile era of 1940s Kolkata.
Dibakar said while there were seeds of the time and space in the author's stories that start from the '30s and go till '60s, he picked up the '40s because it was the most interesting one.
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"Calcutta was under the shadow of war. It was a huge sea port for allied forces and like every war there was gangwar, drugs and weapons smuggling. Bengal famine actually happened because allied forces diverted foodgrains to Greece to feed the army. I wanted all of this for my backdrop," the director said.
"It's the skill of the writer and director to keep the background and foreground different but to keep the relation between the two.
"What happens in 'Byomkesh' is that it starts as the backdrop and suddenly you realise that it was the foreground all along. Byomkesh did not know it, and when he realises it, he understands that this mystery is too big to handle for one man," he added.
"Detective Byomkesh Bakshy!" also stars Anand Tiwari and Swastika Mukherjee in principal roles. The movie, produced by Dibakar Banerjee Productions and Yash Raj Films, is set to release on April 3.