Der Schlüsselmacher [The Key Maker]

At first sight, this key service does not differ from others. However, there are more and more indications that strange things are happening here. After a long discussion with the federal prosecution you decide to investigate this case. Without prior notice you are finding yourselves in the middle of a voyeur's cave. Where did he get all the dubious videos from? Can you find enough evidence to put an end on the key maker’s activities?