No one takes Spencer Zumbro seriously when he tried to warn his
classmates about the mysterious things prowling the halls and classrooms
of Welcher Elementary School. But when he sees Marv, the janitor, going
after one of the creatures with a vacuum, he knows he's not the only one
who can see them.
With the help of his new friends, Daisy, Spencer has to find out what
the janitors know. The children's search uncovers the magic taking place
behind the scenes of their seemingly ordinary school, where a battle is
being waged for the minds of the students. Who can be trusted--and can
Spencer and Daisy protect their school and possibly the world?