The gas station attendant is shot dead in a gas station in Mainz - the second and this time fatal attack within two weeks. The only witness is the blind law student Rosa Münch, who still lives with her parents and longs for a life beyond the overprotective control of her father. Ellen Berlinger and Martin Rascher investigate the traces of the two perpetrators and follow the indications of the blind: the smell of an expensive perfume, the voices of suspects, the details heard and felt by Rosa at the crime scene. The commissioners want to put the vulnerable Rosa under police protection, but the young woman refuses. On the contrary, when a young woman tries to get in touch with her, whose voice sounds familiar, she keeps it to herself. Ellen Berlinger and Martin Rascher suspect that Rosa knows more than she says - maybe even knows the perpetrators, likes them, finds them attractive - lets herself into something that she withholds from them. The investigators have to continue investigating without your support and resort to unusual methods to prevent further deaths.
—ARD Das Erste