Primarily based on the best-selling Indian Bengali novel Narak Sanket written by Debarati Mukhopadhyay, bimbette engineer Rudrani is invited to London by her writer to inaugurate the worldwide version of her e book on cryptography. She meets an elusive man, Schumacher, who requests her to decrypt the puzzles left behind by her grandfather — clues that may result in a treatment for most cancers. Whereas Rudrani, alongside along with her engineer husband Priyam, takes on the problem, what she doesn’t realise is that she is getting sucked right into a pool of harmful worldwide conspiracy. In a race towards time, Rudrani and Priyam should uncover the clues to the antidote of a dreaded virus that challenges the very existence of mankind. From 1943 Germany to the hidden secrets and techniques of Swastika, from secret societies to novel viruses, from Netaji Subhas Chandra Bose to Adolf Hitler, the difference is a mind-boggling journey throughout the UK, Eskay Motion pictures’ dwelling away from dwelling.