The episode begins with yet another one of Aelita's nightmares. In it, she's entering the Hermitage, and inside, she meets the men in black. She then wakes up screaming in her bed. She goes to the bathroom to wash her face and is confronted by Sissi who heard her scream and asks her why she was screaming. Aelita then starts crying and Sissi becomes worried enough to ask if she's alright but then Jim comes and asks Sissi what is going on. She explains that Aelita is not feeling well and when he asks her why she is still up, she answers that Aelita's scream woke her up. Jim takes Aelita to her room and when they pass Jeremie's room, he wakes up and asks Aelita what happened. She tells him that it was nothing. The rest of the children in the hall peek out. Jim tells them all to go back to sleep, and all the lights go out.
The next day, she explains the dream to the gang. Both Yumi and Odd think it was just a nightmare. Yumi then asks Odd about his Internet dating, and he says that he has met an amazing girl who goes to Kadic, but he does not know who it is exactly. According to Ulrich, they stayed up the whole night chatting. Odd tells his friends that she is really romantic and starts to tell a poem she sent to him, but Jeremie finishes it and says that it was written by the author of The Little Prince.
Later that day, the eighth-graders are having a swimming lesson and Jim has warned Jeremie that he cannot come with more excuses and he has to participate in the lesson. Jim has a speech for the class about water, and he totally confuses himself and he claims that he used to be a salvage diver. Odd does not listen and tries instead to find out who his mysterious girlfriend is and Ulrich gives him some ideas. Jim hears this and tells Odd and Ulrich to jump into the water for a small race.
Aelita’s visions are coming back; she is now being chased through the basement of the Hermitage by the men in black. She faints and falls into the pool. Jeremie, without hesitation, jumps down after her and brings her back to the surface. Back in her room, she tells the others about the vision, but they do not think it is a big deal and that she should just rest. Odd is again chatting with his cyber-girlfriend and takes the computer with him to the class. Right after Jeremie promises to come to her after the chemistry class and closes the door, Aelita leaves the bed.
In the science classroom, Odd bumps into Sissi, claiming he mistook her for a doorpost and then he finds out his cyber-girl is in their class. Jeremie then remembers that he has not made a Superscan and when he does, he finds an activated tower in the Desert Sector. He, Ulrich and Odd ask if the can go to the bathroom, but Mrs. Hertz, who is in a very bad mood, does not allow them to leave. Meanwhile, Aelita decides to return to the Hermitage and she mixes pictures of the abandoned house, with images of the place when someone once lived there. In the living room, she sees a man in a white lab coat playing a piano, which fades away rather quickly.
In class, Mrs. Hertz asks Sissi a question, but she is unable to answer it because she was drawing an arrow-pierced heart on her paper instead of paying attention in class. The bell rings and Jeremie goes to get Aelita, while Ulrich warns Yumi, and tells the others to meet up at the Factory. Aelita walks to the child room where she found Mister Pück and is getting more dreamlike visions. When Jeremie comes to her room, he finds it empty, with Mister Pück on the pillow. He calls Aelita and they decide to meet at the factory. Then she sees the men in black again, and now the man in the lab coat reappears outside the door, he calls her by her name and tells her to come quickly. He shows her a secret way to the sewers.
She meets the others in the lab and says that she had more visions and that the man she saw was Franz Hopper. Odd then realizes that the visions could be X.A.N.A.'s attack (he explains that X.A.N.A.'s implanted virus is stimulating her cerebral cortex, placing her in an artificial sleep) and Jeremie confirms that it could be true. After virtualizing Aelita, Ulrich, Odd, and Yumi into the Desert Sector, Jeremie brings up the vehicles. The tower is guarded by one Tarantula and two Bloks. Yumi drops off Aelita not far from the edge of the sector and the warriors engage combat with the monsters. They kill the Tarantula and one Blok with no problem, but Aelita runs to the edge of the sector and somehow manages to summon the Transport Orb on her own so she can go to Sector Five and find information on the visions. Jeremie disagrees with her plan, but she does not listen. Meanwhile, Yumi kills the last Blok and Jeremie tells the team to go to Sector Five and find Aelita.
When the team arrives at Sector Five, the countdown is still ticking and Aelita is caught by the Scyphozoa. They find her on the other side of a big room and there is only one way to her, by jumping between moving pillars in the middle of the room. Yumi points out that they will never make it to the Aelita on time so Odd fires a laser arrow at the Scyphozoa, which releases Aelita, but then Odd is smashed between two pillars and is immediately devirtualized. Ulrich is then able to chase the Scyphozoa off. Yumi presses the Key right before the countdown reaches zero. They reach the elevator and the celestial dome.
Yumi and Ulrich jump on their vehicles, but Aelita stops at the interface to get information. Jeremie angrily tells her that she needs to head back to the Desert to deactivate the tower, but she refuses to listen. Jeremie gets so furious and desperate that he even orders Ulrich and Yumi to "Drag her out by force!" but three Mantas hatch from the Celestial Dome and Yumi and Ulrich try to fight them off. Jeremie tries to convince Aelita to leave Sector Five, but she still does not listen. The Mantas then drop flying mines and the Scyphozoa returns and attacks Aelita one more time. Ulrich tricks the mines to crash into the Scyphozoa forcing it to let Aelita go. They then return to the Desert Sector and Aelita deactivates the tower.
Back at school, Aelita tells the gang that her visions are gone, but she still wants to find the origin of the hallucinations and she feels like she is reliving the events that she was dreaming. Yumi suggests her that her visions might have been the memories of the other person and X.A.N.A. implanted them in her brain to scare her. Odd finally gets to meet his computer-girlfriend in real life, finding out it's really Sissi, and when she sees Odd she asks why he's acting so strange, almost "as if he never saw her before". Odd whispers to himself "never like that".
- The original French name for this episode is Empreintes.
- Chronologically, this episode takes place after Temptation. However, it aired weeks before.
- This episode marks the only time where the Scyphozoa attacks Aelita twice in the same episode.
- Odd's farewell clip in Echoes was taken from this episode.
|Code Lyoko: Season 2|
|New Order | Uncharted Territory | Exploration | A Great Day | Mister Pück | Saint Valentine's Day | Final Mix | Missing Link | The Chips Are Down | Marabounta | Common Interest | Temptation | A Bad Turn | Attack of the Zombies | Ultimatum | A Fine Mess | X.A.N.A.'s Kiss | Vertigo | Cold War | Déjà Vu | Tip-Top Shape | Is Anybody Out There? | Franz Hopper | Contact | Revelation | The Key|
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