Code Lyoko is a French animated series that follows a group of five boarding school students (Aelita, Jeremy, Odd, Ulrich and Yumi) as they do battle against a malevolent AI known as XANA. Be thankful that I shared that little tidbit of backstory with you, as the game doesn't bother to fill you in on any elements of the series' story. Code Lyoko: Quest for Infinity is basically a retelling of the fourth season of the show, as the students must do everything they can to stop the rapidly spreading XANA and save their friend William from the evil AI's corruption. If you don't follow the show religiously, you may have a hard time understanding what's going on, and even if you are a fan, you still may struggle to keep up. Basically, if you pick up this game on a whim, know that you'll need to do a lot of research if you hope to have any idea of what's going on.