When Livvy Redmond arrives in neutral Lisbon, she discovers a city full of spies, refugees, and the secret police. London is in the grip of WWII and there are Nazi secrets to uncover in Lisbon. At an elegant party to meet a double agent, Livvy witnesses him fall to his death from a balcony and must now determine what secrets he wanted to pass her. Further complicating matters, she must guard the man’s young daughter from forces trying to kidnap the girl.