The Masters are called to Spelea, where they discover Lord Dactys and his warriors defending themselves from a Caligar attack. While King Randor mediates a truce between Lord Dactys and Ceratus, the Snake Men take advantage of the distraction to enter the Temple of Serpos, intent on awakening the Guardians of Old...
Years ago, two leaders battled for the fantastical land of Eternia, one became the good King Randor, the other grew into the evil monster Skeletor who plans to rise once again and take Eternia. To protect the kingdom, the mystical powers of Castle Greyskull chose a hero - Randor's lazy, impulsive teenage son Adam.