It's been four months since the Lyoko Warriors rid the world of XANA. Sissi has been integrated into their friend group, and a new girl arrives shortly after the beginning of the school year. Everything is going well until strange electrical things start happening again, bringing them to question if their old enemy was actually defeated.

High school. A time of happiness and conflict. The gang are mainly juniors, and they're dealing with the ups and downs of adolescent life: Romance, peer pressure, etc. T for certain situations.