Essex, 1916

Lily is a housemaid up at St Clere's Hall. But times are changing with the outbreak of war. With a husband bent on signing up for the trenches and a lecherous master of the house, Lily is forced to leave.
Doing her bit for the war effort - and bringing in more money for the family - Lily goes to work in a factory making explosives to send to the trenches. It's a hard job. The munitionettes must face terrible working conditions, the constant danger of accidents and air strikes and a patronising, self-serving boss. And then someone she never wanted to see there arrives. Lady Charlotte, the pampered daughter of the Hall, joins the factory as a supervisor...

Lily and Charlotte have choices they never had before - but in the shadow of the Great War, can the factory girls work together for a better future?