Skeletor captures King Randor, Prince Adam, Teela, Man-At-Arms and Orko, intending to attack the Palace and take over Eternos City. Since Adam is unable to become He-Man when in Skeletor's clutches, only one person is able to save them... Queen Marlena, as pilot of the Rainbow Explorer, the ship which brought her from Earth to Eternia. Using her amazing pilot skills she leads a fleet towards Snake ountain to rescue Skeletor's captives.
