School secretary Annett Ludwig is jogging by the sea. She discovers a dead teenager under a steep cliff: Theo Jacobsen, a pupil at her school. The 17-year-old was considered an inconspicuous outsider. Karin Lossow knew Theo from commercial school, where she led a course on legal issues as part of a project week. By chance, she had witnessed a bullying attack on Theo, who was at the top of his class, and offered to help the boy. Rainer Witt and his colleagues Holm Brendel and Dorit Martens investigate Theo's laptop. It turns out that he was engaged in a lively trade in test questions, which he sold to his classmates and made thousands of euros in profit. To do this, the alleged model pupil used access to the headmaster's surfer - only school secretary Ludwig knew the password.