During the German occupation of Greece, the brave officer of the Greek Army, Lieutenant Yorgos, arrives in Athens to assist a small team of Resistance fighters. This time, their goal is to blow up a German battleship in the port of Piraeus. With the help of Maria and Eleni, two selfless patriots who work undercover, the group of saboteurs manages to obtain a document right under the nose of the sadistic SS Commander Ernest von Müller: a vital piece of information that will help ensure the success of the operation. However, only hours before the dangerous sabotage mission, the Nazi secret police rounds up thirty men, threatening the outcome of the crucial operation. Can Yorgos carry out his life-or-death mission?