Kate Moore is an expat mum, newly transplanted from Washington D.C. In the cobblestoned streets of Luxembourg, her days are filled with play dates and coffee mornings, her weekends spent in Paris or skiing in the Alps. Kate is also guarding a secret, one so momentous it could destroy her neat little expat life. She also suspects that another American couple are not who they claim to be, and her husband is acting suspiciously. As she travels around Europe, she finds herself looking over her shoulder, terrified her past is catching up with her.