Gopichand Jasoos

Gophichand Jasoos, released in 1982, is about an overweight and middleaged outofwork private detective played by Raj Kapoor. Bela, played by Zeenat Aman is Gopis neighbour. Gopichand, gets assigned to trace some diamonds that have been stolen. He finds that the diamonds are located in a coffin in a Catholic burial ground in Goa.

Source: Wikipedia