Saturn Space Hotel: The Mystery of the Missing Plans
You are interviewing General Duncan Hughes

"Do you have any idea what this is?" you ask the general.
He studies it carefully. Then he looks at you. "A part of a map?" he says.
You look at him to see if he was lying or not, if he knew what it really is. But you find out he is telling the truth. "You really don't know what it is?" you ask the general again holding up the plan.
"No what is it?"
You shake your head, "It doesn't matter to you." You leave the general puzzled.