A facially disfigured man named Arlington Steward (played by the impressive Langella) turns up at a young couple's house and offers them a choice: ignore the box he had previously delivered, or open the box with a key, hit a red button and they will receive 1,000,000 dollars tax free. The catch is that if they push the red button, someone somewhere will die. Not something that most of us will experience in our lives I would imagine.
Its all set in the seventies and as a period piece it delivers very well. The ethical maze the couple go through is interesting, but it all gets a bit confusing when the film attempts to explain Mr Steward's modus operandi (something to do with being hit by lightening and acting as an agent for some unspecified superiors), especially as there are vague but apparently meaningless references to the Viking probe's mission to Mars.
Its quite a clever story, but at the time of watching it I saw too many imperfections to completely wow me. That said, I kept thinking about it time and again over several days and that counts for a lot in a movie these days.