Right in the middle of science class, all the students’ mobile phones start ringing. But when they answer, there is no-one on the line. Mrs. Hertz confiscates everyone’s phone. Jeremy realises that X.A.N.A. is behind these ill-timed rings. The super calculator is using the communications antenna to take control of a very powerful military satellite, which it could use as an instrument of mass destruction!
Only a victory on Lyokô can save the day and above all, Yumi, who is X.A.N.A.‘s first target.
