The time has come for Inspector Patrick to retire from active duty. He takes paternity leave so that his beloved Erica can finally dedicate herself to writing her new book. However, the situation is not ideal, as Erica struggles to concentrate on her work. Her mother's diaries from the years of World War II, which she recently discovered, have unsettled her. Meanwhile, Patrick finds himself entangled in a murder case in Fjällbacka. The victim is a retired history professor specializing in World War II. The situation becomes more complicated when an elderly lady is also found dead. The solution must lie in the past, as both victims belonged to Erica's mother's circle of friends.

To uncover the truth, Patrick and Erica will work together and delve into a labyrinth of family secrets and hidden guilt...