A year has passed since the Super Computer was shut down, and now it is time for school to begin once again.
"Hey guys," said Odd as he walked over to Ulrich, Aelita, and Jeremy as they sat at their desks in the science room.
"Hey Odd," said Ulrich as he high fived his friend and roommate.
"How was your summer?" asked Aelita.
"It was good, I taught Kiwi how to do some new tricks," said Odd as he sat down next to Ulrich.
"Alright everyone, quit down," said Ms. Hertz as she walked in.
"Today might be the first day of school, but I'm going to teach you some basic science," said Ms. Hertz. Suddenly, the lights started to turn on and off.
"What's going on?" asked Ms. Hertz.
"It can't be," said Jeremie with a worried expression. Some beakers over open flames then busted from a sudden increase in the flames.
"Hello, Lyoko Warriors," said a voice from the class computers as XANA's mark appeared on the screens.
"Not possible," said Ulrich in a low voice.
"You thought that by shutting the Super Computer down, I would be trapped; but I was freed before that happened, now this world will be mine," said XANA. The next thing they knew, everything stopped malfunctioning. Later that day in Jeremy's room, all six of the Lyoko Warriors had gathered.
"I thought XANA was gone for good," said Yumi.
"We all did, but since he's back you know what we have to do," said Jeremy with a worried expression.
"We have to start the Super Computer and go to Lyoko to see if we can find the tower he activated this morning," said William.
"I'm alright with going back, but he does not come with us," said Ulrich who was worried at what might happened to him.
"William's part of the team, Ulrich," said Yumi.
"But the first time we took him with us he fell to XANA," said Ulrich.
"He does have a point," said William who understood what Ulrich was getting at.
"Don't worry, when we brought him back from XANA's control, part of the
re-materialization made it to where he can't be controlled again," said Jeremy.
"Really?" asked a surprised William. All Jeremy did was nod his head.
"If Einstein says you're alright to go, then you can come along," said Ulrich as he held his hand out.
"I promise you that I won't let you down," said William as he shook Ulrich's hand.