Baksho Rahashya

Famous Bengali private investigator Pradosh C Mitter Feluda is hired by wealthy businessman Dinnanath Lahiri His suitcase has been accidentally exchanged with someone on the Kalka Mail Inside it is a valuable manuscript written by Shambucharan Bose The case takes Feluda Topshe and Jatayu to Shimla where they discover a priceless diamond in a film container disguised as a betel nut The Three Musketeers face great danger in Shimla before Feluda eventually solves the case