Mike Brace (Christopher Walken) is a technological genius who's created a device that can record and play back human thought. But the military catches wind and emerges as an unwanted 'silent partner' in his project. Soon, Mike and his wife (Natalie Wood) are thrust into a breathless, non-stop race to prevent the machine from falling into the wrong hands and becoming the ultimate government weapon in this touching, thought-provoking thriller.