The discovery of Helga's whereabouts bring only brief cheer to the Children, as a strange explosion occurs nearby - Cooks and Hollingsworth investigate to discover a man named Kirchner abducted his younger sister from a house and made it explode with some kind of strange blue energy - Kirchner has undergone the same process as Shinon, and the Children explain it as something to do with "OSL", which emanates from the "Zone"...