Niko Lautnach, CEO of Lautnach Technologies, is found stabbed to death in the company’s kitchen. Was it an act of revenge by wrongfully terminated employee Tarek Ösil, or was it perhaps a crime of passion? A check of the access card records determines that, apart from the dead man, only one other person was present at the company at the time of the crime, his sister Caro. But Caro can’t remember anything, because she suffers from illness-related blackouts.