Der Schlüsselmacher [The Keymaker]

From the outside, this locksmith company looks completely normal. But there is increasing evidence that strange things are happening there. After a long struggle with the public prosecutor's office, you and the investigative team decide to take a closer look at the matter. Without warning you find yourself in a voyeur's cave: where did he get all the dodgy videos from? Can you find enough evidence to stop the key maker?