When Matthew imagines that each of the problems connected with his new school is really a monster, his grandmother helps him devise a plan to deal with these fears.
Two members of the Dog Squad, Detective Dominic Dachshund and Detective Max Dalmation, chase clues and interrogate suspects until they solve the mystery of the disappearing bones.
Because everyone they invited to open house at their school turned down the invitation, the twins Craig and Sarah have a big surprise when the day finally comes.