It's no news anymore that Sushant Singh Rajput's upcoming film 'Detective Byomkesh Bakshy' is set against the backdrop of the Second World War. And in last one year, as a part of his preparation the actor learnt a lot about history.

Recently Sushant visited Kolkata for the poster launch where he visited the Old Eastern Hotel. He was touched by the fact that during the World War the hotel was bombed by Japanese planes and was largely destroyed. It was a brutal attack and Sushant was overheard discussing that the incident reminds him of the recent Taj terror attack. Sushant actively spoke to Dibakar about the attack and dug for more details. While the hotel has been restored, there yet are yet areas which are reminiscent of the war. Sushant took a walk around the hotel actively talking to Dibakar and the staff there who were filling him in with details.

Said Sushant, "Though I have been to Kolkata several times before, this was the first time I visited the hotel. Exactly seventy years ago Japanese bombers dropped a bomb right here. The vibe and the history of the place brought back the shoot of Byomkesh Bakshy for me - when I was right inside Calcutta 1943! It was like time travel where i had landed back to the future!"

Even on sets Sushant often used to indulge in long conversations with Dibakar on various facets of the war and the implications Kolkata faced during that time. He has been defeacto learning history and has got more and more intrigued with the subject.

Watch 'Detective Byomkesh Bakshy' Trailer