The effects of hallucinogenic drugs provide a theme in this case. Peta Best, a leading sixties fashion photographer, has been found dead in her studio with a cloth pushed down her throat. Natasha Marlow, a young model who was with Peta Best at the time of her death, is charged with murder but claims that herself and the photographer were 'freaking out' after an L.S.D. session and she would therefore have been incapable of committing murder.

Bernard Gallagher, known for his role in Casualty, appears as the prosecuting counsel. David Ashford plays the counsel for the defence. John Bennett, known for appearances in Miss Marple and Doctor Who, is Dr Stanislaus.