Sievers and the Golden Fish
During an experiment, physics teacher Stefan Conrad falls to his death. What initially looks like a tragic accident soon turns out to be murder. The suspects include both students and teachers at the boarding school. According to his fellow teachers, Conrad made a special effort to be popular among the students by handing out above-average grades. Could the jealousy of his colleagues be a motive for murder? There are also rumors going around of Conrad having an affair with a student.