At some point, something had gone wrong. Isolated from their friends, two heroes struggle to make their way back home and to piece together the mystery of just what has happened to them before it's too late.

X.A.N.A has won. The artificial intelligence now rules earth. Humanity stands on the brink of extinction. The Lyoko warriors are now only a distant memory but among the remaining humans, some of the warriors still struggle to survive in a world ruled by their old arch-nemesis.

After Cyclonia's victory seems complete, two sky knights find themselves separated from the rest of Atmos and all they hold dear. Years later, the unexpected arrival of an old enemy turns their new world upside down. Now, the sky knights have to choose whether to stay in their hidden paradise or return to save Atmos. AerrowXStarling