During the school physicals, Xana possesses the school nurse, Yolande, and has her kidnap Aelita. The rest of the group beats her to the factory, but has no way to get Aelita from the far more powerful nurse. Having no other choice, Jeremie decides to test out an experiment which will give a person the same powers as one possessed by Xana. To do this, he has to activate a tower like Xana. Jeremie's towers turn green instead of red. Odd volunteers, and is enhanced by a ghost of Jeremie's design. This allows Odd to fight the nurse effectively while the others deactivate the tower. This fortune doesn't last, however. Xana is able to take over Jeremie's tower, reversing the effect of the ghost to drain Odd's energy. And on Lyoko, Xana makes everything invisible. Now the group has to deactivate not only the original tower, but the tower that's draining Odd's energy.

El XANA ha posseït la Yolanda, la infermera del col·legi, perquè capturi l'Aelita. La seva intenció és dur-la a Lyoko per lliurar-la a l'Scyphozoa. En Jeremy sap que han d'impedir que la Yolanda arribi als escàners, i ho farà posant en pràctica un nou projecte: activar una torre per donar poders a l'Odd.

在学校体检期间，Xana 夺舍了校医 Yolande，并让她绑架了 Aelita。其他人没有办法从比她强大得多的护士手中救出 Aelita。在别无选择的情况下，Jeremie 决定做一个实验，让一个人拥有和 Xana 一样的能力。为此，他必须像 Xana 一样激活一座塔...

C'est le jour de la visite médicale au collège ! Mais l'infirmière scolaire se retrouve sous l'emprise de XANA et Aelita se fait capturer.

Chegou o dia dos exames físicos na Academia Kadic! O XANA possui a enfermeira da escola e captura Aélita.

¡Es el día del reconocimiento médico en el colegio! Pero la enfermera del colegio se encuentra bajo la influencia de XANA y capturan a Aelita.