Jeremy Belpois, a 12-year-old prodgiy attending boarding school Kadic Academy, discovers a quantum supercomputer in an abandoned factory near his school. Upon activating it, he discoveres a virtual world called Lyoko with an artificial intelligent girl named Alieta trapped inside it. Jeremy learns of X.A.N.A., a fully autonomus, malovent, and highly intelligent multi-agent system, that also dwells withing the Supercomputer. Using Lyoko's powers, X.A.N.A. can possess electronics and objects in the real world like a virus to wreack havoc. Jeremy is aided by his three friends Odd Yumi and Ulrich who are virtualized into Lyoko and Earth. Once the tower is activated Jeremy can launch a "Return to the Past" Program.
