Crime writer Erica Falck is shocked to discover a Nazi medal among boxes in her late mother's attic. She resolves to dig into her family's past to uncover the reasons. It leads her to a retired history teacher who had been her mother's friend during World War II. Two days later the man is brutally murdered. Detective Patrik Hedstrom, Erica's husband, becomes embroiled in the investigation. The answers may lie in her mother's diaries, but can they find them before the old dark secrets surface?