One day at school, Jeremy notices that Odd, Ulrich, and Yumi are missing. Meanwhile, Odd, Ulrich, and Yumi ARE at school with Jeremy! What's going on? Turns out that XANA (in the form of Jeremy) has trapped Odd, Ulrich, and Yumi in a virtual world identical to the boarding school, completely at his mercy. With Aelita's help, Jeremy reaches the fake school and tries to convince his friends that he is the real Jeremy and that the imposter is XANA. When they learn that Jeremy got into the scanner to come here, XANA claims that Jeremy is the fake because he would never go into the scanner. But the others say that if his friends were in danger, he would. XANA gets angry and tries to crush everyone with wires and holographic zombies of Jim, Nicholas, and Herve. But Aelita destroys the false school just in time, foiling XANA's plan.

Com de costum, els nostres herois han aconseguit desactivar una altra torre. També, com de costum, han pogut tornar a temps al món real. Aquesta vegada, però, quan en Jeremy es presenta a la classe de ciències, dotze hores abans, s'adona que l'Odd, l'Ulrich i la Yumi no hi són. En realitat, no han tornat de Lyoko!

Odd、Ulrich 和 Yumi 困在了一个和学校一模一样的虚拟世界里。在 Aelita 的帮助下，Jeremy 到达了虚拟世界，并试图让朋友们相信他才是真正的 Jeremy...

Lorsque Jérémie se retrouve en cours de sciences 12 heures plus tôt, il se rend compte qu'Odd, Yumi et Ulrich manquent à l'appel et ne sont pas rentrés de Lyoko.

Ao chegar 12 horas antes à aula de ciências, Jeremy apercebe-se de que Odd, Yumi e Ulrich não se encontram lá — eles não regressaram de Lyoko.

Cuando Jérémie se encuentra en clase de ciencias 12 horas antes, se da cuenta de que Odd, Yumi y Ulrich están desaparecidos y no han regresado de Lyoko.