A School as a Criminals Playground l

Prologue; A series of unfortunate events start at an elementary school and targets a 5th grade group of friends, Baju (Ba-hoo), Lentonio, Annie and Quinne. The friends all got to school, early as usual, expecting the ordinary, but instead, we're greeted by a blue figure that was small and looked like a transparent ghost. They followed it, until they were in a new place. A town. A ghost town. After going through a school of broken glass and cob webs, they find a basement full of mysteries that lead them back to school. Happy they're back, and it wasn't the end of school, they we're greeted by they're parents, but no authorities. So the question remains, how did the parents know they were gone?