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.

A young girl is found in a communial bathing area drowned. Dr Graf concludes that while she did drown, it wasn't there.