Dark forces are gathering at Bloor's Academy as the Bloors search for a lost box containing a hidden will -- a will that reveals the true destiny of the Red King's heirs. And the Bloors are determined to keep Charlie Bone from finding it first. But Charlie is also facing the lord of the sea, who is trying to drown his parents, and a deadly expert swordsman from another century. The Red Knight might be the only hope. But who is the mysterious Red Knight? And can he help Charlie and his friends defeat the evil magic for good?