When Asa Pike, a Bloor's Academy student with the ability to change into a beast at dusk, goes missing, twelve-year-old Charlie Bone suspects a new classmate, the magically gifted Dagobert Endless, of foul play.
Magically-gifted Charlie Bone, accompanied by his best friend's dog, Runner Bean, comes to the rescue when the enchanter Count Harken takes revenge on the Red King's heirs by kidnapping and imprisoning Charlie's ancestors in the dark, forbidding land of Badlock.
Charlie and the Children of the Red King must call upon all of their strength to defeat the darkness and finally learn the fate of Charlie's family, the evil intentions of the Bloors, what has become of Septimus Bloor's will, and the destiny of the Red King's heirs.