XANA creates viruses which attack human brains, causing amnesia. Sissi takes advantage of this and convinces Ulrich that Odd, Yumi and Jeremy are his enemies. Now they must battle their friend and find a way to reverse the viruses.
Stars: Sharon Mann, David Gasman, Matthew Géczy
Director(s): Jérôme Mouscadet, Paul Guidal
Writer(s): Sophie Decroisette, Thomas Romain, Alain Serluppus