Former pop star turned entrepreneur Trevor Delacy and his Electric Soundscapes company are about to launch their new synthesiser onto the market. But all is not what it appears to be.

With much fanfare, a scary new science fiction series, Fear Frequency, premiers on British television. Cheaply produced and rather schlocky, it nevertheless makes an impact in an unexpected way, attracting the attention of Lieutenant Bill Bishop, who is still recovering from the events of ‘Domination Game’.

Discovering a connection between the television series and Delacy, Lethbridge-Stewart sends Regimental Sergeant Major Samson Ware to infiltrate Electric Soundscapes. Meanwhile, Bishop is eased back into active duty with a supposedly easy investigation of strange goings-on at an old persons’ care home.

Of course, nothing is ever easy for the Fifth Operational Corps, and Lethbridge-Stewart and his men soon find themselves battling against numerous opponents and frightening new weaponry.