Kamu Mukherjee

When Goopy and Bagha learn about Hirak Raja's tyranny, they try to set him right with the help of Udayan, a schoolteacher, and their magical powers.

Mukul 6 years old son of Sudhir Dhar, shows signs of having memories of previous birth. He drawing pictures of a 'Golden Fortress'. Dr. Hazra examines him and told that the place is in Rajasthan and takes Mukul to Jodhpur for its search. Feluda a private detective learning that Sudhir's son is in danger. The climax comes in Jaisalmer where Felu is able to free Mukul from danger.