Sonar Kella (1974)

Mukul, a six year old boy, is obsessed with drawing pictures of a golden fortress, and claims to have lived there in a past life. Hoping to better understand the boy's condition, parapsychologist Dr. Hajra accompanies Mukul to search for the fortress. However, a newspaper story alerts a pair of crooks to the possibility of a hidden treasure. The boy's father fears Mukul is in danger, and hires private detective Prodosh "Feluda" Mitra and his cousin Topshe to join Hajra and Mukul in Rajasthan. But the danger may already be closer than they realize.