You work for british intelligence. your office has secretly cracked the german enigma code-a program you call ultra-which allows you to listen in on much of the secret german communication. on nov 12, 1940, you intercept german messages describing operation moonlight sonata- an air raid in great strength for the night of nov 14/15, 1940, against the cathedral and industrial city of coventry. you have only days to act of the information. but anything you do will alert the germans that you had foreknowledge of the raid-probably from breaking their enigma code- germany will then change the code system that will eliminate any future information being retrieved.
who are the interested parties?