Rudy, a large brown dog from Hamburg, Germany, is a good friend of Heinrich, a truck driver. They explored Europe together. When not on the road, they live with Heinrich's sister, Elena. One day, Heinrich becomes seriously ill and is hospitalized, making Rudy restless. Elena, Heinrich's sister, contacted a veterinarian who diagnosed Rudy with grief. Elena asked the doctor so Rudy could visit Heinrich at the hospital. After approval, Rudy slowly approached Heinrich's bed and rejoiced when he saw him. Heinrich's presence made Rudy enthusiastic and happy again.