Overview: Arnout crosses De Biesbosch National Park and looks for beavers. But they are not so easy to film. Sound man Ruben leaves a camera in the park and hopes to have better luck during the night. In Willemstad, Arnout speaks with the very last witnesses of the Rhenus 127 disaster. That was a ship full of Belgian prisoners of war that struck a mine near the city during the Second World War...