A man is murdered by being stabbed after he spends a day taking photos of men. As he looks into the victims life, he discovers he was homosexual and begins to wonder if that may have led to his death or if it was something he took a photo of and if so - which photo?

A girl who works as a telephone exchanger overhears a murder while trying to connect a call. What the murderer doesn't realise at first is that the witness is blind, but that doesn't stop them from wanting her dead. Moser leaves town to follow a lead, leaving Rex to protect her from harm.