In Season 4, after the victory of XANA, Jeremy and Aelita's mission will be to rebuild a new Lyoko. They  succeed to reprogram the Sector 5.Parallel, Jeremy has succeeded in  building new stuff that will allow the Lyoko Warriors to explore the Worldwide Digital Network (the digital sea) to find and bring back William on Real World and see how to access to XANA to stop his evil plans.New weapons, new costumes with new helmets and accessories, and a new vehicles will allow the new quest to begin for our Lyoko Warriors.Further in the Season, the Lyoko warriors are going to discover that there are numerous copies of Lyoko in the Worldwide Digital Network, all controlled by Xana : "Replikas". Jeremy realizes that XANA has transformed since it escaped from the Super Computer to the Digital Sea. Now it will be harder for our Lyoko Warriors to localize XANA and to defend themselves from XANA attacks.A new war begins, with huge missions for our Lyoko Warriors.This product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply.