The Kimberly Magic Academy combat league is heating up with the upperclassmen now going head to head! Meanwhile, the Sword Roses--flanked by several seniors--delve deeper into the labyrinth in pursuit of Rivermoore, who stole one of Godfrey's bones for purposes unknown. They find themselves in Rivermoore's home turf, a veritable kingdom of the dead where hordes of skeletal beasts and ghastly foes are at his beck and call. Will Oliver and his friends manage to fend off the necromancer's onslaught and recover Godfrey's missing sternum? What role does the coffin on Rivermoore's back play in his schemes...?