The Debt

When Heaven and Hell clash in a pointless war, the wish for a utopia stems from the middle. But since diplomacy would never work, a spy would have to be sent in, one to be a demon but to retain everything that makes him an angel. But what if in the middle of the war, the spy learnt of what's really happening? What would he do to stop the supremacy and dominion? Angel Demon AU, USUK