Tom Tomsky, a timid nine-year-old, reluctantly agrees to help professional ghostbuster Hetty Hyssop find the Incredibly Revolting Ghost that is haunting the Averagely Spooky Ghost hiding out in Tom's attic.
As Bluejay--Mo's fictitious double--tries to keep the Book of Immortality from unraveling, Adderhead kidnaps all the children in the kingdom, and demands that Bluejay either surrender or doom the children to slavery in the silver mines.
