Berlin, September, 1945. Two manuscripts are found in rubble, each one narrating conflicting versions of the life of an Irish spy during the war. One of them is the journal of a German military intelligence officer and an anti-Nazi cowed into silence named Adrian de Groot, charting his relationship with his agent, friend, and sometimes lover, an Irishman named Frank Pike. In de Groot's narrative, Pike is a charismatic IRA fighter sprung from prison in Spain to assist with the planned German invasion of Ireland, but who never gets the chance to consummate his deal with the devil. Meanwhile, the other manuscript gives a very different account of the Irishman's doings in the Reich. Assuming the alter ego of the Celtic hero Finn McCool, Pike appears here as the ultimate Allied saboteur. His mission: an assassination campaign of high-ranking Nazi doctors, culminating in the killing of Hitler's personal physician. The two manuscripts spiral around each other, leaving only the listener to know the full truth of Pike and de Groot's relationship, their ultimate loyalties, and their efforts to resist the fascist reality in which they are caught.