Young Polish filmmaker Michal Wnuk finds an Agfa box of 120 photographs and 2 reels of 16mm film. For the first time, he gets to see World War II through the eyes of his grandfather, who served in the Wehrmacht. Soon Michal discovers that the box didn't belong to his grandfather but to his great-uncle Elek - an anti-German fighter and a decorated war hero. Michal uncovers the intriguing story behind the Agfa box, traveling across Poland and Germany in a journey that leads him back to the last summer days of 1939.