Her letters can save the country. But can she be trusted? London, 1944 A double agent. As World War Two rages on, newly promoted MI5 agent Sarah Gillespie is thrown into the dangerous world of espionage when she is tasked with handling Adeline Vernier - a mysterious double agent from Paris.  A dangerous mission. Adeline’s secret-coded letters hold the key to Operation Bodyguard – a critical plan for the allies to halt the invasion of Northwest Europe. But in return, Adeline demands the rescue of her boyfriend from Nazi-occupied France, leaving Sarah to question her motives and fear a potential double cross. She knows there are millions of innocent lives at stake. Letters that could change their lives forever. As they embark on a dangerous journey through the cities of Lisbon and Berlin, they must tread carefully to avoid the clutches of the enemy, facing challenges unlike anything they could have imagined. Will they be able to survive the dangers and make it out alive, together? Or wil