The Secret of the American Docks(Das Geheimnis des Amerika-Docks)

James Mistoll, one of the owners of a factory working on a process to turn copper ore into radium, falls from a window in the fourth floor and is dead. But it soon transpires that this was no accident, but murder. A case for the famous detective Max Landa, who begins to investigate the case. He sends his assistant Barnes into the company and soon the number of suspects multiplies...