Knee-deep in the water, the fisherman casts his line. He pays no attention either to the small sheep outlined on the opposite bank or to their shepherd's distant shouts. The two men can see each other quite clearly but do nothing to acknowledge it. They act as if they were on different planets.
And in a way they are. The fisherman is wading in Serbian waters, the shepherd and his flock are in Romania, and we are observing the scene from Bulgaria. We are all divided by the Danube and its tributary, the Timok.