A little girl is hiding somewhere in Ystad. She has seen something terrible and must be put to silence at all cost. Meanwhile, a trafficking trial commences where Wallander and the prosecutor Katarina Ahlsell have their lives threatened. The frightening situation forces them slowly to reassess their professions and lives. As the little girl herself contacts Wallander to tell him what she has seen, they both end up in a dramatic showdown with their lives at stake.