Hikaru, Umi, and Fuu are pulled back to Cephiro just as the world their first adventure saved starts falling apart again. Without a princess to serve as its Pillar, the realm has no one holding it together, and rulers from three other worlds move to claim it for themselves. The three Magic Knights must find a new Pillar before Cephiro collapses entirely, even as their own bond gets tested by the invaders' schemes. This direct sequel to Magic Knight Rayearth picks up right where the first series left off.