Jeremy is woken up by the Superscan when it picks up two activated towers. He warns the others, and just as they're leaving Aelita receives a message from an unknown sender asking her to meet them in a nearby building. While she's thinking about it, Laura comes and asks why she's not in class, then realizes that the others are at the factory. Aelita tells her to go on ahead, which she happily does. Aelita then goes to the meeting place and finds a blonde-haired woman there; her long-lost mother, Anthea. They share a warm mother-daughter embrace. Jeremy offers Laura the controls and goes to find Aelita, realizing her "mother" is actually a spectre, and tries to convince her of it. Aelita doesn't believe him and returns to the spectre. Meanwhile, Laura figures out XANA's strategy; activating the two towers one after the other in a specific sequence of prime numbers.

Aelita reçoit un message sur son ordinateur lui donnant rendez-vous dans un manoir. Sur place, elle y découvre sa mère, Anthéa. Mais Jérémy y devine un piège. Il demande à Laura de s'occuper de commander ses amis sur Lyoko pendant que lui essaye de sauver Aelita.

Xana lanza un ataque inusual usando dos torres que se encienden y apagan de forma aparentemente aleatoria. Los Guerreros de Lyoko buscan cómo desactivar las dos torres, mientras Aelita cae en la trampa de un espectro que se hace pasar por su madre. Jeremy es el único que puede ayudarla. Laura toma el control y conduce magistralmente la misión en Lyoko.