An emotionally gripping WW2 novel about the power of love and resistance in the hardest of times, inspired by real events. 1942. Hannah Martel has narrowly escaped Nazi Germany after her fiance was killed, taking refuge with her cousin, Lily, in Brussels. Desperate to flee Europe, Hannah joins the Sapphire Line- a secret resistance network led by a mysterious woman named Micheline and her enigmatic brother Mateo. But when Lily's family are arrested and slated for deportation to Auschwitz, Hannah finds herself torn between her loyalties and her own determination to escape. How much is Hannah willing to sacrifice to save the people she loves?