A brand-new tale, based on the fourth season of the show, unfolds as William is being held captive somewhere on Lyoko by the evil virus X.A.N.A. Gamers will follow our heroes on a quest to destroy X.A.N.A. Their final challenge is to defeat the mysterious and dangerous Volcano Replika containing the very core of X.A.N.A.: a crater containing a number of towers one of which holds William.
