During a West Gloucestershire Police conference in Cheltenham Town Hall, DI Steph Lewis and her colleague DC Harriet Harris are summoned to a film studio in nearby Imperial Mews. Viewers of a popular chat show have reported one of the panellists collapsing on air.

At the scene, Steph and Harriet discover the man, a controversial and unpopular doctor, sprawled on the floor. The livestream is still running, other panellists are horrified and the studio is in chaos. Is the death accidental, the result of a severe allergy, or is there more to the fatality than meets the eye?

Then a video of the detectives’ unsuccessful resuscitation attempt goes viral, causing Steph and Harriet unwelcome media attention.

The pair must cast aside personal animosity, aggravated by the press intrusion, to investigate their suspects: the producer, the studio runner, the cameraman and the diverse cast of panellists. Nothing about this on-screen death adds up.

Is just one of them a murderer? Or do they all have something to hide?