While on patrol, Girwidz stops at a public restroom to take a capsule of his dietary supplement, "Hormonal Harmony." It is said to improve Girwidz's well-being. In the restroom, Girwidz discovers the body of general practitioner Dr. Volker Imhoff. Apparently, the doctor died of hypoglycemic shock—low blood sugar resulting from his diabetes. Girwidz is visibly shaken by the doctor's tragic fate, a reaction that intensifies when the death turns out to be a homicide. Upon closer examination, Dr. Fuchs discovers that the insulin had been tampered with, leading to an overdose.