Une affaire classée redevient d'actualité et met tout sens dessus dessous, mêlant les vies de plusieurs personnes.

Anna, a young and naive woman, moves to Knutby to become part of the free church congregation as a nanny, which to her seems like a warm and pious community. But soon the idyll that never existed crackles, and manipulation, power games, social exclusion, group pressure, brainwashing, fanaticism and both more and less religiously sanctioned left-wing chatter end in murder and grief.