This is the story of a brutal murder of a ten-year-old girl named Helen Nilsson. The crime took place in the late 80s in a small Swedish town called Hörby. It shocked not only the local residents but the entire country. The investigation lasted for several years - from 1989 to 2004. At first, many townspeople hoped to find the child alive. The search for the girl was carried out by Helen's relatives, law enforcement officers, and a large number of activists.