During the early stages of Barbarossa, Finland was offered a deal from the Soviet Union, and Britain, I believe. The Soviet suggestion was peace for Finnish territories lost in the 1939 war. Finland, because of general euphoria from German 'victories' in Barbarossa, refused, and took the worst course of action. It stalled, and lost its chance to get out of the war, sealing its fate for the time.
But what if it hadn't? What would the Germans do?