The premise is that there's a couple who are a bit short of cash. Struggling to keep their house, living paycheck to paycheck. Then one day a box turns up with a large button on top of it and a mysterious message : if you push the button, two things will happen. One, you will be given one million dollars. Two, somewhere in the world, a person whom you do not know will die.
So would you push it? And if not for a million, how about ten million? A hundred million?
Incidentally I guess this works best if you don't know the ending to the story, which is this :