Sissi has found something very special and dear to Ulrich, his diary! Unfortunately the diary contains some information on X.A.N.A. and Lyoko. Sissi decides to use this as a means of blackmail to get with Ulrich. Later Odd, Ulrich, Sissi, and some of the other students are going to a pool, the bus that their riding in is X.A.N.A.'s next target. He wants to ram the bus into a chemical plant. Now the team must head to Lyoko to help Aelita get to the tower to save the students and the rest of the city.
Stars: Sharon Mann, David Gasman, Matthew Géczy
Director(s): Jérôme Mouscadet, Paul Guidal
Writer(s): Sophie Decroisette, Thomas Romain, Christophe di Sabatino