Middle school sleuths Jeannine Fitsimmons and Will Allen may be brave and clever, but they are still no match for the horrors they face when monsters begin infesting their town! But in a fantastic stroke of luck (or IS it?), a mysterious business card appears that summons the Great Monster Detective, Bigelow Hawkins, to teach them how to conquer their fears and defeat the monsters. Now, in their Baptism of Fire, can these newly christened monster detectives unravel the clues and uncover the secret of the dreaded Hidden Beast in time to save themselves and their friends from its terrible power?