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.

When a wealthy patriarch falls ill on his 70th birthday, three of his sons rush in from Calcutta, leading to a reunion filled with painful ironies and lingering disillusionment. As the family—including an addled fourth son who lives with the old man—watches and waits, the static occasion brings out simmering tensions in their family dynamics, from the father’s moral rectitude to the business ambition of two sons and the withdrawal of their siblings.

Feluda, the famous Bengali detective tackles an international buyer, a corrupt arts agent, numerous henchmen and impostors in this story that revolves around a painting of Jesus by the famous Italian painter Tintoretto.

Ashoke Gupta is an idealistic doctor working in a town near Calcutta. He discovers that the water at a popular temple is the source of an outbreak of typhoid and hepatitis. In order to save lives, he risks his career to try and call attention to this polluted water source, while a local group of building contractors attempt to discredit him in various ways.

Shibnath is released from prison after serving eleven years for assaulting a British officer. His family has now become refugees, with his homeland, following Partition, belonging to a new nation. His wife urges him to make ally with his friend Bipin who is willing to capitalize on Shibnath's legendary reputation for patriotism, by asking to accompany him in electoral campaigns. In exchange, Bipin is ready to arrange Shibnath the job of a school master. However, Shibnath remains disillusioned and mystified by the life that now lies before him away from his beloved—and irretrievably lost—homeland.