May 1993. Two eleven-year-old boys are found murdered in a field in Sweden, with a dead hare between them. The case remains unsolved.

Eight years later, an identical crime scene is discovered in a field in Norway. This time, a fox is found between the boys. Holger Munch, head of the newly established Homicide Investigation Unit, has gathered the best investigators from the Oslo police, who immediately take action. Soon, Mia Kruger joins them. A young student at the Police Academy, she is determined to become the first woman to join the Emergency Response Team. However, her plans take a different turn when she excels in a test that reveals her unique talent for examining cases from a different perspective. Thus, when she is offered to participate in this investigation, she cannot refuse. Little does she know that this decision will change her life, plunging her into a world shrouded in darkness.

A thrilling prequel that introduces us to the beloved Holger Munch and Mia Kruger, in their first joint case.