A fictional story with elements of humor that acquaints the viewer with a rather unusual version of the origin of all the familiar fact. Slicing sausage at an angle - that's what this is about. Why did everyone get used to cutting it just the other way? This will help us understand Otto Koring and his fear of small residents of abandoned buildings and grain businesses - mice. One weird sunny day in the middle of the nineteenth century, in Vienna, there is a discovery, which everyone, without noticing, continues to use until now.