Synopsis

Rejected by Yumi, William becomes determined to uncover the secret she keeps hidden. He soon tracks Ulrich and Odd to the factory, learning of Lyoko and Xana in the process. Simultaneously, in the Ice Sector, the Scyphozoa takes possession of Aelita, intending to infiltrate the way tower with Code:Xana, but is severed from the virtual world just in time. The group anticipates William's assistance will prove valuable, yet a possessed demolition worker plants several bombs within the factory. They