Samantha Suarez - Odd's former sweetheart and girlfriend - enrolls at Kadic, and the boy eagerly pursues her. At the same time, he is being pursued by a polymorphic specter, which XANA is able to create due to its new increase in strength and power. The others go to Lyoko to deactivate the tower but are all devirtualized by a giant wall of Bloks. Odd destroys the wall using a scanner eyepiece programmed by Jeremy and deactivates the tower. Meanwhile, Jeremy's computer is set on repairing a corrupted video file recovered from the Cortex. Eventually the task is completed and the gang watch the clip of Franz Hopper, furious at an employee who stole some documents of his. He fires the man and storms out, but the man remains in the room and laughs, calling Franz too naïve. Aelita identifies the man as Professor Tyron though she had never heard of him before.

Un nouveau spectre est envoyé au lycée. Odd s'en retrouve victime et ne sait plus s'exprimer autrement qu'en baragouinant des propos incompréhensibles. Sur Lyoko, la tour est inaccessible car elle est protégée par un mur composé de nombreux Bloks.

Mientras que una torre está activa en el sector del desierto Lyoko, Jeremy envía a los Guerreros de Lyoko para desactivarla, pero se enfrentan a un completo muro de bloques, que desvirtualizan a todos los guerreros uno a uno. Todos menos Odd, quien ha permanecido en la academia para ver a su ex, Samantha, que se queda en Kadic. Desafortunadamente, Odd se ve atrapado por un espectro de Xana, con efectos secundarios muy desafortunados.