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.
Charlie and his friends unite to rescue Ollie, a boy who was turned invisible and made to live in the attics at Bloor's Academy more than a year ago, but they are hindered by a mysterious new student who lives with Charlie's aunts.