The killer strikes again. Hilkka returns to Spain. Andrés begins to suspect that Police Chief Coréa is protecting someone. The friendship between Hilka and Andrés deepens in the aftermath of an evening on the beach.

Hilkka is kidnapped. The kidnapper tells Hilka a sad story from the distant past, a youth camp called Children of Summer. The story leads Hilka toward the time and place where evil originated.