The Defenders' secret training is interrupted when an earthquake signals that the monstrously evil Megalith is breaking free. Their mentor, Professor Alnar reveals to them that their training will not be completed. They must immediately embark on a dangerous mission to re-imprison the Megalith by recovering the four Pure Stones. Before the Defenders can leave the Dojo and start on their epic quest they are attacked by a vicious Rock Serpent and must face their first full on Di-Gata Battle!