Magic Academy combat league is heating up with the upperclassmen now going head-to-head! Meanwhile, the Sword Roses--joined by several seniors--delve deeper into the labyrinth in pursuit of Rivermoore, who has stolen one of Godfrey's bones for purposes unknown. They find themselves on the necromancer'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 friends manage to fend off his onslaught and recover Godfrey's missing sternum? What role does the coffin on Rivermoore's back playin his schemes...?