A little girl is hiding somewhere in Ystad. She has seen something terrible, and must at all costs be brought to silence. At the same time, a trial on human trafficking is opened in Ystad District Court, where Kurt Wallander and prosecutor Katarina Ahlsell are subjected to death threats. The frightening situation forces them to look at their profession and each other's lives with new eyes. When the young witness makes contact with Kurt Wallander, he soon finds himself in the middle of a dramatic situation with both of his life as efforts.