It was the first telefilm made for Feluda 30, the TV film series, which aired on DD Bangla.

[citation needed] The film is the sequel to Joy Baba Felunath (1979).

Feluda is approached by an established businessman who claims to have mistakenly swapped his suitcase (baksho) in a train with one belonging to one of his co-passengers and now wants Feluda to put it straight.

This simple looking problem lands Feluda, Topshe and Lalmohon Ganguly in Shimla, and into a realm of deceit and mystery involving a long forgotten diamond and a priceless manuscript,A Bengalee in Lamaland.

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