Five dead canaries - 3

As thousands of Brits are fighting on the front line, a new breed of women emerges to hold the Home Front together.

Fiercely independent and fiery-spirited, these women are a group of munition workers.

The 'canaries', so-called because of their chemically-stained yellow faces, decide to celebrate leader Florrie Duncan's birthday, but their frolics are soon cut short when all but one are killed in a startling explosion. And with five times the victims, there are five times the possible motivations for the murderer.