A couple is approached by a mysterious man who offers them a huge sum of money to spy on a brilliant scientist who is believed to be developing the math to enable interstellar travel. The man’s ‘clients’, he claims, are not of this world and have a vested interest in suppressing this research. Arranging for the scientist to live in a bugged house at which the couple will play housekeeper and chauffer, they try to outsmart the most brilliant scientist in the world.