A group of students is on a field trip to an ancient castle when a storm erupts. As they are about to leave, four friends are cornered by the class bully, who tries to pull one of his usual pranks. Instead, they all get the scare of their lives when they fall down a tunnel that takes them into the future: a future where mankind has nearly disappeared from the face of the earth, and where nature has taken control. The friends will have to face up to this hostile new world—as well as their nemesis—if they're to have any chance of making it back home...

The future is no walk in the park... as our five young friends are about to find out once more!With the help of the Knights Templar, our heroes have made another jump through time in an attempt to return to the present and their families. Something has gone wrong, however, as they find themselves somewhere else in the future. It's a savage, ravaged world, where the survivors face a daily fight for survival against gangs of teenage hooligans. Mei, Driss, and the others decide to join an outpost of the resistance at an old theme park as they come to grips with a frightening new reality and try to find a way home... before it's too late!