Before WWII: Dr. Hasenbein lives with his son Peter in a small town. Aunt Uschi's orphanage houses many children and a hamster. When the hamster falls ill, Dr. Hasenbein is given something to do. The tailor, Mr. Voss, is also treated by Dr. Hasenbein: for tendinitis. During the war, Dr. Hasenbein has to go away. When he comes back after 30 years, everything has changed...