The group goes about their lives without Yumi, and Franz returns as a science teacher at Kadic. Over the days, the group helps Franz reorganize the Hermitage.
"How you holding out without Yumi, Ulrich?" Asked Odd, while they were working on the Hermitage. Ulrich remained silent.
"He's been like that ever since we left the factory that one day, even Jim and Herve are concerned about him." Said Aelita. Franz walked over to Ulrich and knelt down next to him.
"Ulrich, I know your sad, but you have to forget about her. Otherwise you'll give yourself a stroke." Said Franz, in an attempt to relax Ulrich.
"Leave me alone…" Ulrich murmured.
"He spoke!" Shouted Odd. everyone laughed at that statement. Everyone, except Ulrich that is. His goal was to make Ulrich laugh, but he failed. "Aw, c'mon Ulrich! You used to always laugh at my jokes!"
"Times change…" Said Ulrich as he walked out of the Hermitage.
"I was serious about what I said to him…" Said Franz, in a concerned voice. Ulrich was walking into the gym, when Sissi walked by.
"Ulrich, you haven't even said one word to me for a month now!" Said Sissi, What's your malfunction, huh?" Ulrich just continued walking, getting strongly provoked in the process. "Well?" Said Sissi, still waiting for an answer. Ulrich swung his leg around and kicked Sissi in the head, then continued walking like nothing happened. Unfortunately, Jim saw Ulrich as he kicked Sissi, and ran over to Ulrich.
"Hey, Ulrich! What's your malfunction, huh?" Asked Jim.
"Do you want the same think to happen to you?" Replied Ulrich.
"You've got a lota' nerve to say that to a teacher!" Said Jim. Ulrich warned him, but Jim didn't heed that warning. Ulrich, in response to that statement, jumped and kicked Jim in the head and knocked him out. This time, the principal was watching.
"Ulrich, what did you just do?" Asked Mr. Delmas.
"I'm sorry sir… it's just that I miss Yumi so much that I haven't said very much at all, and they got on my nerve by asking why I haven't said anything." Replied Ulrich.
"Ulrich… did you… knock out Jim? How on Earth did you do that?"
"I'd rather not say." Said Ulrich as he Started to walk toward the dorms. Mr. Delmas wasn't going to punish him, because he understood his situation. Mr. Delmas took Jim and Sissi to the infirmary.
"They got hit by a door? You've gotta be kidding me!" Said Yolande.
"Really, they were walking through and wham! Right in the face." Said Mr.Delmas.
"Well I don't see how that happened, but if you say so…" Said Yolande. She wanted to know what really happened, but she knew that Mr. Delmas would never tell her if he made up an excuse that bad.
Ulrich was lying on his bed, wondering why he was still sulking about Yumi's death. "Franz was right, I'm going to give myself a stroke unless I forget about her." Said Ulrich. Shortly after, there was a knock at his door. "Come in." Said Ulrich. William walked in. "What now?" Asked Ulrich.
"I wanted to help you forget about Yumi." Said William.
"Thanks, but I already have a plan that would make me forget that Yumi ever existed." Said Ulrich.
"Well, my method wasn't to make you forget that she existed, but if that's the way you want it, fine." Said William as he walked out of Ulrich's room. Ulrich's plan was almost flawless. It was to erase his DNA from the super computer and activate return to the past. That would erase his memory of the super computer all together. Ulrich got up out of his bed, left his room, and headed for the park. On his way to the sewer, Odd caught a glimpse of Ulrich.
"Ulrich, why are you going into the sewer?" Asked Odd, as he walked over to Ulrich.
"I'm going to forget everything, XANA, the super computer, and Yumi. The super computer is my ticket to forgetting." Said Ulrich.
"Okay, have fun!" Said Odd. In the sewer, Yumi's last words haunted Ulrich's mind, constantly saying "Don't ever forget me." The words got louder as he approached the factory. Ulrich got inside the elevator and went down to the computer's core. Yumi's words in his mind were louder than ever. It was like someone was yelling it in his ear. Ulrich walked over to the switch and turn the computer on. Right when he switched the computer on, he saw Yumi for just an instant like a flashback he could see.
"I must be imagining things…" Said Ulrich. Ulrich got back into the elevator and went up to the lab. Ulrich entered the coordinates for the return trip and he had his finger above the enter key. "I… I can't do it…" Said Ulrich as he pressed delete and erased to coordinates. "Yumi told me to never forget her." Ulrich went back into the elevator and left the factory. He forgot to turn the computer off.
Back at the Hermitage, Jeremie's laptop beeped. Jeremie opened up and his eyes widened with surprise. "The super computer… is back on… but, the towers are black again." Said Jeremie.
"Who turned it on?" Asked Aelita.
"It was Ulrich, he told me he was going to activate return to the past to erase his memory." Said Odd.
"The black towers… are deactivating and Lyoko's coming back to life. All the towers have power again!" Said Jeremie.
"What was Ulrich thinking!" Exclaimed Franz.
"Wait, all of the towers are black now… all forty." Said Jeremie. "What's going on? Lyoko's dying again." Jeremie put the computer down because of the weird moment. "That's it, Lyoko's dead again. Not even the passage towers can be activated again."
Back at Kadic, Ulrich was heading to his room, when he ran into William. "Hey Ulrich, Odd called and told me what you were going to do, why didn't you do it?" Asked William.
"I couldn't. Yumi's last words were 'Don't ever forget me.'" Said Ulrich.
"Oh. So that's why." Said William. Another month passed. The group was at the Hermitage hanging out with Franz.
"Hey Odd, have been stealing food when I'm not here? Asked Franz.
"No! Why would I do that? I'm not a thief!" Said Odd. "Say, why you ask, anyway?"
"Lately I've been coming home after school, and come to find out, I'm missing some food from my fridge." Said Franz. No one in the group was taking the food. "By the way, I'm having the factory tore down next month." As soon as Franz said that, Ulrich saw Yumi again, but this time, it last longer.
"We sould go to the factory and see what we can salvage." Suggested Ulrich.
"Grand idea! Let's go." Said Franz. The group went to the backyard of the Hermitage, through the sewer entrance, and to the factory. In the factory, Ulrich visions of Yumi were getting worse. Now, instead of the words "Don't ever forget me," the words said "Thank you for not forgetting."
"Time we got back to the Hermitage, it's getting late." said Franz.
"I think I'll stay here a little while longer." Said Ulrich.
"Okay, bye Ulrich." Said Jeremie, as everyone walked out of the factory. Ulrich stood there in the factory. He heard voices, that weren't in his mind. "Thank you for not forgetting me." They said. After a few minutes, the voices stopped. Silence swept the factory. Ulrich stood there for five minutes then walked over to the elevator.
"I better turn off the computer. I can't believe I forgot to turn it off." Said Ulrich. Ulrich felt a hand on his shoulder. He quickly did a swing kick, but stopped in the middle of it once he saw who it was.
"Wow, your a little tense." Said the person in front of Ulrich.
"Y… Yumi?" Said Ulrich as he walked over to her.
"Didn't I tell you never to forget me?" Asked Yumi.
"I thought you… died…"
"I did, but when you disconnected Lyoko from Sector five, I came back."
"Yumi…" Said Ulrich as he threw himself into Yumi's arms.
"Let's go home now Ulrich, It's been a long few months." Said Yumi.
Chapter 11: XANA's Doppelganger.
It's a celebration! The group finally destroyed XANA, Yumi's back, and best of all, Franz Hopper isn't on FBI files anymore! Although the group doesn't need to go to the factory anymore, they still go there for memories, until the day it gets torn down. Those memories of fighting XANA will never leave the group, but Aelita had a strange feeling the past few days, like something was going to happen. She tried explaining to her father and Jeremie, but they didn't help. They thought she was just worried, but there's more to it than that, she knew something was going to happen, something evil. At Kadic, Aelita went over to Jeremie's room and knocked on the door. "Come In." Said Jeremie.
"Jeremie, you know those feelings I told you about?" Asked Aelita.
"Both me and your dad told you, your just worried."
"I'm not worried Jeremie, I know something evil is about to awaken, something even more evil than XANA."
"Doubt it, but if you say so, we'll be more careful, okay?"
"Okay, thanks Jeremie." Said Aelita, as she walked out the door. Jeremie really did doubt what Aelita was saying, but in a way, he had those feelings too. That night, Odd and Ulrich were walking to the cafeteria for dinner.
"Hey Ulrich, you hear that music?" Asked Odd.
"What music?" Asked Ulrich.
"It sounded like danger music, but it went away." Said Odd. That really confused both Odd and Ulrich, but they didn't let it bother them. Back in Jeremie's room, Jeremie is typing away at his computer, and missing dinner. He wasn't feeling too hungry.
"Okay, so you hate me, who cares? There're more people who would be glad to be my friend." Said Jeremie. He was on a computer forum. "Hey, he's knew, wonder if he'll be my friend?" Jeremie typed a little more and became friends with the new guy. A topic went up asking "Where do you go to school?" Jeremie replied "Kadic academy." His new friend replied, "Really? I teach there!" Jeremie and his new friend get in a conversation about who they are, until Jeremie new friend posts, "Jeremie? Is that you? It's Franz!" Jeremie was so amazed by that he posted "Gotta go," and left the forum. Right when he quit his internet program, a picture came up on the screen. "AAAAAAAAHHHH!" Jeremie screamed. Aelita came running down the hall, into his room, and noticed that Jeremie was lying on the floor.
"Jeremie what happened?" Asked Aelita.
"It… was… horrible…" Jeremie groaned.
"What was?"
"All I remember was a picture of an island, and after that, is just blank."
"No…" Said Aelita in a faint voice.
"What is it?" Said Ulrich as he, Odd, and Yumi ran into the room.
"That evil I was warning you guys about… it's here, and it already attacked Jeremie." Said Aelita.
"Okay, let's take him to the infirmary, and tomorrow, we'll see if Franz knows anything about this." Said Yumi.
"Oh, speaking of Franz, I talked to him on a forum. I didn't even know it was him." Said Jeremie, in a raspy voice. Aelita and Ulrich carry Jeremie over to the infirmary.
"What happened to him?" Asked Yolande.
"We don't know, and neither does he." Said Ulrich.
"What do you mean?" Asked Yolane, very confused.
"I really don't know what happened. One minute I was typing away at my computer, and the next thing I know, I was on the ground." Said Jeremie.
"Things like that happen when you stare at a computer screen too long." Said Yolande. The next day the group goes over to the Hermitage.
"Hi dad." Said Aelita.
"Ugh… oh, hello Aelita." Said Franz, as he put his hands on his head.
"What happened?" Asked Jeremie.
"The thing I fear the most, and because of it, we can't destroy the factory." Said Franz.
"Why not?" Asked Odd.
"You see, I built another computer in that factory, but it went evil, like XANA did. I shut it down, and I programmed it only to turn back on when the super computer is on, but XANA isn't on Lyoko. I didn't tell anyone of you that because I forgot."
"Uhh… my bad…" Said Ulrich.
"Ulrich, what did you do?" Asked Franz.
"I accidentally left the super computer on when I went down there to erase my memory, but couldn't do it, thanks to Yumi." Replied Ulrich.
"Do you realize what you've done? You set free Xanadu!" Yelled Franz.
Chapter 12: The Secret of Xanadu.
"Xanadu? sounds resembling." Said Odd.
"You see, Xanadu is much more evil than XANA ever was. Xanadu was made to power up any computer I wish." Said Franz. "It can also send specters out of any computer to destroy anything I desire. You see, the FBI was after me for this, not XANA. I had to shut down Xanadu, but I made the computer so a switch won't shut it down. I need a pass code to do it."
"Why would you want to make a computer like that?" Asked Aelita.
"I was insane back then. Then I met your mother, Aelita. She changed my life." Said Franz.
"And do you remember the pass code?" Asked Jeremie.
"I was getting to that. After I met your mother, Aelita, I began on a new project, to counter-act a military project called, 'Project Carthage.'" Said Franz. "My goal was to not only make a computer to stop the project, but to design a digtal paradise, Lyoko. On the sidelines, my wife cheered me on, every step of the way. Sadly, she was stricken by a deadly disease. When She died, I focused on my studies more, and played my piano to relax when the stress got too intense. Eventually, my work was done, and I stopped "Project Carthage" dead in it's tracks. In Lyoko I hid the pass code, in order to keep it safe, but I forgot the pass code."
"You need to stop with the speeches, Franz." Said William.
"So, is there anyway to help you remember in case this happened?" Asked Yumi.
"Yes, inside Xanadu, I also hid the pass code. I just can't remember where." Replied Franz.
"So, now instead fighting XANA, were going to fight Xanadu?" Asked Ulrich.
"Wait, I think I saw that computer in the factory." Said Jeremie. "One day, my computer got a virus, and in order to talk to Aelita, I had to go to the super computer. On the way out of the factory, I decided to explore, don't ask why."
"Why?" Said Odd.
"Very funny Odd. Anyway, I came across another elevator, and because I wanted to know where it lead, I took it. It lead me down to the computer Franz was talking about, but it was off, of course." Said Jeremie.
"Okay, tomorrow, we check things out." Said Ulrich.
"Hey, why tomorrow? There's still plenty of daytime left, it's only 11:16." Said Odd.
"Okay, I'm down for it, let's go!" Said William. The group goes over to the factory, and takes the second elevator to Xanadu. The group stood in amazement at how much the terminal looked different. This one could monitor the entire landscape, instead of just a pixel view.
"Okay, Jeremie, your going to have to go in once Xanadu attacks." Said Franz.
"Aww, I never liked being virtualized." Said Jeremie.
"This virtualization process is much smoother than the other." Said Franz.
"Oh, then I'm alright with it." Said Jeremie.
Chapter 13: XANA's Return.
Franz was worried about transferring the rest of the group into Xanadu. He knew that once he did, something bad would happen, but he shook it off and started the transfer.
"Virtualization." Said Franz as he virtualized Ulrich, Yumi, and Odd into Xanadu. The computer terminal made beeping noises. "I was afraid of that. Yumi, Ulrich, Odd, you can feel every hit you take, plus, a tower just got infested by specters
"Woah… oh sorry, what?" Said Odd, as he checked out the landscape. "Hey, Ulrich, your pants are all… poofy."
"And you look more like a cat than before, now you have whiskers and cat ears!" Said Ulrich, starting to laugh at the weird way Odd looked.
"Can you two knock it off, we're on a mission, remember?" Said Yumi. Yumi looked almost unchanged.
"Okay, let's go." Said Ulrich. The group goes off into Xanadu.
"You must clear the tower of specters, it's at the north-east corner of the landscape." Said Franz.
"Uh Franz, wasn't Aelita, William, and I going to Xanadu too?" Asked Jeremie.
"Well, since you three are weakest in Lyoko, your some of the strongest in Xanadu. It's a different story for them, however." Replied Franz.
"Then why not send us in? And who you calling weak?" Said William.
"I need to remember the code to transfer you three, it is also in Xanadu."
"You and your codes." Said Odd. "Why didn't you just make it like Lyoko?"
"I said I was insane when I made this!" Exclaimed Franz. "Oh, by the way, Ulrich and Yumi's weapons need to be charged by me out here."
"What? you mean I can't do anything right now?" Asked Ulrich.
"Actually, you can, I just got finished charging them." Said Franz.
"Uh, guys? I think I just spotted the tower…" Said Yumi, terrified by the sight of the tower.
"Okay, I'm outta here." Said Odd as he started to walk away.
"Oh no you don't!" Said Ulrich as he ran in front of Odd. "If we have to feel all the pain of battling these things, you do too!"
"Jeeze, I was just playing around. I wasn't really going to leave my friends behined. Unless it's all-you-can-eat dessert day at the school." Said Odd.
"No time for jokes, they're coming this way!" Yelled Yumi.
"Let's go!" Said Odd. After a while, the tower was clear of specters.
"Look for spheres of data, they will have the code." Said Franz. "Wait, this can't be!"
"What?" Asked Ulrich.
"It's… XANA… he's in Xanadu." Said Aelita.
"No need to be alarmed, Aelita. I was just shocked to find that the good part of XANA still exists. Notice how the eye is white." Said Franz.
"Hey, I found a sphere, inside there's a word that says 'After'" Said Odd.
"That's a password!" Yelled Franz.
"Me and Ulrich found one too. It just has the letter 'O'" Said Yumi.
"I remember now! I spit all of the passwords into different pieces, and some of them are hints in different pieces." Said Franz. "Wow, 5:00 already? Okay, that's a wrap, let's get back to the school." Said Franz as he de-virtualizes them, just one problem, they're not coming out of the scanners! They're not in Xanadu either!