While Selma Kirsch tries dining in a dark restaurant served by blind people, chef Nadja Aust is fatally stabbed. Blind waiter Jörg Winkler feared her reporting his purse thefts and could find her easily. Health inspector Sascha Lammert hides knowing her personally, but has no apparent motive. Stefan Katzbach recently discovered his ex Susanne Henke's affair with Nadja Aust after he divorced her, and he lied about being there, seen by Jörg Winkler. IT-specialist Rico Sander still spots a counter-indication on security video footage.