Garrison is sent to eavesdrop on a meeting that several high ranking generals will be attending. And among them is a Field Marshall who is one of Hitler's confidantes. Garrison shows the guys the man's photo and Casino says he looks like a criminal he knows, Frank Keeler who is in an American prison. Garrison eavesdrops on the meeting and the Field Marshall is called away before he could join it. Garrison's overhears the conversation the rest are having and hears that they are planning to assassinate Hitler. Garrison then reports to his superiors. They assume the men were hoping to get the Field Marshall's support and they think he won't. So Garrison decides to get Frank Keeler to replace the Field Marshall and give his approval and they will assassinate Hitler. So Garrison goes to the US to talk to him but problem is that Keeler escaped.