Children have been disappearing from their bedrooms under circumstances so mysterious that local police call in the Bureau for Paranormal Research and Defense. The kids find cold comfort from fishman Abe Sapien and the disembodied ghost of Johann Kraus -- but when the innocent fantasy world of monsters and magic they used to enjoy becomes engulfed in terror and nightmares, the bizarre strangers who show up to help don''t seem quite so scary after all.