The sandman

Stockholm. A young man is found staggering on a railway bridge. It turns out he was kidnapped 13 years ago - when he was still a child. The serial killer Jurek Walter abducted him back then. However, he has been in a psychiatric facility in isolation for the past seven years. For Commissioner Joona Linna, this means: There must be an accomplice! Joona asks a colleague to have herself committed to the psychiatric facility. Someone needs to gain the trust of the serial killer...