1940. London is facing the full wrath of the blitz and amid the chaos Sheila Phipps is
orphaned after a devastating air raid claims her family and her home. She is evacuated to
Bletchley to live with her aunt Constance, where she forms an unlikely friendship with
Prudence Le Strange, who is working in the codebreaking unit at Bletchley.
As their friendship grows stronger, the war subjects Sheila and Prue to fresh tragedies as,
one...