 Instead, Roosevelt employs former FBI Agent Jackson, who had left the Bureau under a cloud and incurred Hoover's personal enmity, and who is completely loyal to the President.The bulk of the book follows Jackson's chase after the photo, starting from Paris at the very eve of its fall to the Wehrmacht and concluding with a cataclysmic confrontation at a secret Michigan base of the "Silver Shirts" – a murderous, power-mad American Fascist militia.The chase ends with a mixed result – the Nazi agents have been killed or captured, but the negative did fall into the hands of the FBI who caught the scent of what was going on.