Jeremy is convinced that the band of Lyoko Warriors needs to get into shape to better fight against Xana. Who better than Jim, a former Special Forces drill sergeant, to whip them into shape? Our heroes-including Jeremy-find themselves enlisted in a “commando camp,” that soon shows our young recruits where their limits lie! While training, they also have an opportunity to discover more about the life of their drill sergeant gym teacher. But soon enough, Xana attacks… And while Jeremy stays behind to assist a wounded “GI Jim,” the Lyoko Warriors will have to apply their newfound skills in order to reach the factory…