Pearl has given up on her dreams of being a journalist after being denied a promotion because of her gender. Joining the WAAF as a radio telephone operator for Bomber Command, Pearl's new job at RAF Fenthorpe serves two purposes – providing an income for her grandmother, and keeping a close eye on her younger sister, Thea, an instrument repairer at another Lincolnshire bomber station.

When Evie's dreams come crashing down, she's determined to still make something of herself in these trying times...It is 1939 and working class Evie Bishop has received a scholarship to study mathematics at Oxford when tragedy turns her life upside down. Evie must seek a new future for herself and, inspired to contribute to the war effort, joins the Women's Auxiliary Air Force as an Ops Room plotter.

German U-boats are getting through the defences. It's up to the Wrens to stop them.After her fiancé died in the sinking of the Royal Oak, Mary finds herself stationed in Orkney, still battling her grief. With Iris and Sally by her side, she is gradually overcoming her loss and is surprised to be helped by the irascible Joe.

Following a humiliating experience involving the man she thought she’d marry, Iris Tredwick signs up to the Wrens in order to escape and find ‘the right sort’ of man to please her mother. After a bumpy start, Iris manages to befriend outspoken Mary and dreamer Sally as they are sent to their first posting – in Orkney.