Ena Dudley slips quietly away from the Foxden Hotel and heads back to London to see her husband Henry. Things have been difficult between them recently - though she still loves him as much as ever. Arriving home, she's shocked to discover that he's missing - having last been seen being led away by two mysterious men. Ena soon learns that that Henry has been connected to a recently murdered woman, Helen Crowther. Ena knows her husband is no killer and - determined to clear Henry's name - she and her sisters meet in a small room in a West End theatre, once used to hide Jewish refugees in the war. As Ena, Bess, Margot and Claire piece together the puzzle, they come to realize that Henry could be entangled in a much larger conspiracy than just Helen Crowther's murder, one that reaches far back into the past, when the world was still at war. With danger lurking at every turn, the women must summon all their courage and resourcefulness to navigate the treacherous waters of espionage, betrayal, and murder. Ena's determination to uncover the truth and exonerate Henry becomes a race against time, as the Dudley sisters find themselves confronting powerful enemies who will stop at nothing to protect their secrets...