London, 1932. Kitchen maid, Joan Hart, and lady's maid, Verity Hunter, intend to enjoy their trip to the theater, especially as Verity's uncle Tommy is one of the leading men in the play. Unfortunately, Act Two of the play is curtailed when the lights come up in the interval, and the girls realize a man has been stabbed to death almost under their very noses.
The case reunites the servant sleuths with their old ally, Detective Inspector Marks, and whilst the girls do their best to solve the case whilst keeping their jobs, the glitter and glamour of the theater may prove to be as dangerous as any battlefield . . .