The chase is over. The files are public. The monster is awake.
Frank is an expert in pulling the perfect prank and tracking down monsters. But when a cruel new principal, Arthur Gavin, singles him out, Frank is drawn into a dangerous conspiracy.
Ignoring his injured ankle and warnings from his partner, Smith, Frank breaks into an abandoned warehouse... and uncovers the strangest mystery the Monster Files have ever faced.
Racing against the clock, can Frank and Smith expose the principal's operation and bring him to justice?
