It's the oldest con in the book.

An inventor of a secret process suddenly finds himself alone as both his friends and the corporation he works for turn against him.
The Spanish Prisoner keeps every mind human — it fights its subject at zero distance. The story fights on E8/E10/E11 of the E0–E14 reality ladder.
Films fighting at the same level of reality, about the same things.
The same preoccupations examined at another scale — one mind versus a nation.