There's a new wireless in the Fisher household - but there's murder on the airwaves when Dot's favorite show is interrupted by an on air panic. The radio station's bookkeeper and budding announcer is found choked to death but when Phryne gets involved, she finds Jack already undercover as the newsreader. In an ironic turnaround, Phryne is officially engaged to investigate the death - as Jack resorts to more clandestine investigative strategies. In the cut and thrust of the investigation, Dot suffers the terrible realization that she doesn't want to relinquish working for Miss Fisher when she marries and takes up her wifely duties.