Twenty-five years after the end of the war, ageing British SOE operative Noah Ainsworth can't stop thinking about the secret agent who saved his life in occupied France. He never knew her real name, nor whether she survived the war.
His daughter Charlotte begins a search for answers and discovers the story of Fleur and Chloe: two women called up by the SOE for deployment in France in 1943. But little do they know that they're at the mercy of a double agent within their ranks who is wreaking chaos. As Charlotte's search for answers continues, unsettling clues about the identity of the double agent come to light - and more shocking events are unearthed from the dangerous, dramatic last days of the war that lead to Chloe and Fleur's eventual fates.
