Flight engineer and qualified pilot Hanna Lorenz has apparently killed the aviation psychologist Dr. König. His evaluation had ruined the accused woman’s career as a pilot. Benni meets his client when he prevents her from escaping after she is arrested. Hanna Lorenz is a veritable challenge to the defence lawyer. Leo’s preliminary investigations also point to her being guilty. But Hanna swears to Benni that despite her explosive personality, she is not a murderer.