There have been a number of short stories and TV programs with similar plots...
The Outer Limits (TV show) had an episode where a man was turned into an 'alien' through drastic surgery. He was supposed to launch in a space ship and land at the United Nations. Unfortunately, he landed elsewhere, and the chase the find The Monster as The Monster tried to get back to his wife took up much of the episode.
A story described a plan by a group of scientists who developed superior technology. They let little hints drop the led the government to believe they were aliens and led the government to start tracking them. They escaped in a car that grew wings as it zoomed up the entrance ramp to a freeway and flew away. The story tracked the government's efforts to unwind the alien technology. One plot point I remember was the government's search of the 'aliens' headquarters-- they found a strip of microfilm that had slipped under the veneer along the front edge of a desk. The microfilm was in an unknown language. The end of the story described the scientists congratulating themselves on pulling off the masquerade, and that it had motivated the government to put efforts into space exploration. Or so I remember. Thinking back, it feels like an Asimov or someone of that era.