So you are cleaning up in the kitchen when the door rings. You wonder who it is since it is 2pm, and everyone is gone at work. You answer the door to see a sleek black sedan speed away, and you look down to see that the person has left a box. You take the box inside, and decide to wait until your spouse arrives home from work. You both open the box, and inside is a single-button mechanism. However, the button is protected by a glass dome that needs to be unlocked. There seems to be no key, and there is also a letter that says, "I shall call upon you at five o'clock this evening." At around dinner time, you hear the doorbell ring. You answer the door, and there is a man in a long overcoat waiting in the rain. You invite him in and upon eye contact, you immediately feel as if the house has suddenly dropped in temperature. He says, "I see that you have opened the box. The rules are simple. I give you the key, and you can unlock the mechanism and press the button. Once you do that, someone that you do not know will die. You will also receive a million dollars." You look at him, bewildered. "Die?"

He smiles at you at the doorway. "You have until five o'clock tomorrow evening to decide."