Darkness comes to sunny Sidmouth, when, unable to cope after a devastating tragedy, late night radio talk show host Edward Temmis is let go from his beloved job.

Cast adrift, his outlook is bleak – until he meets Stevie, whose grandmother, a devoted listener, died in a suspicious fire last year. Well, nobody hurts his listeners and helping Stevie might just give him the purpose he needs.

When their investigation stalls, they enlist local estate agent Kim, with whom Edward had a doomed fling last year. Working together, they discover Stevie’s grandmother wasn’t the only one of his listeners targeted.

But who is pursuing his ageing audience and why? And can Edward, Stevie and Kim get to the bottom of this mystery before it’s too late?