The autumn gloom comes quickly on the Swedish city of Gothenburg, and for Detective Chief Inspector Erik Winter the days seem even shorter, the nights bleaker, when he is faced with two apparently unrelated sets of perplexing crimes. Mysterious assaults on college students in Gothenburg’s parks are carried out in the dark of the night, while during the day toddlers are abducted from their nursery schools and quickly returned, seemingly unharmed, before anyone even notices they are missing...