 June 1944. The attention of the world is focused on Normandy, but the change of the tide can be felt in Finland also. Rumours of preparations of a massive Soviet attack in the Karelian region are heard everywhere. In the Finnish HQ many officers know the attack is coming, but Marshal Mannerheim is not even informed of the most frightening news. The old marshal is turning 77, but the Soviet Union has an unpleasant gift for him. The army is not all prepared, but who is guilty, and to whom belongs the honor?