It tells the story of Michael Berg, a German lawyer who as a mid-teenager in 1958 had an affair with an older woman, Hanna Schmitz, who then disappeared only to resurface years later as one of the defendants in a war crimes trial stemming from her actions as a guard at a Nazi concentration camp. Michael realizes that Hanna is keeping a personal secret she believes is worse than her Nazi past—a secret which, if revealed, could help her at the trial.