Year 2222. At Moon School XXIII, Daniel, Hector and Bibi are presenting their essais on history. But they're all wrong! Dinosaurs co-existing with humans, aliens in medieval castles, gladiators with laser swords... They will soon discover the reason: their teacher, robot ERN3ST, has a failure in his system and has been teaching them everything wrong.

Luckily, the new teacher, Buenaventura, has a revolutionary solution: she takes the kids on an interdimensional time capsule that will allow them to experience history firsthand. No better way to learn!

Although, it may be more dangerous than it seemed at first. Especially when the kids end up surrounded by a group of Tyrannosaurus rex...