A simple-hearted—even outright simple, really—man turns out to be the look-alike of a much-wanted criminal. As a result, the police train him to impersonate the criminal so that they can get enough evidence to crack down on a web of crime.
I have no idea if Don (1978) was inspired by Mr India. Don is in many ways a very different film (the criminal, for one, dies fairly early on in the proceedings; for another, it’s a much more complex plot): but there is that fleeting resemblance.
Mr India begins by introducing us to Gullu (IS Johar), naïve and simple, as he goes about job-hunting, and getting rejected at every office because he doesn’t fit the regional profiles demanded by the parochial employers of these places. Gullu gets briefly hired by someone who wants to rig a ‘Mr India’ weight-lifting competition, with Gullu pretending to hoist what is actually wooden dumbbells rather than iron.