Fantasy action-adventure about the war-torn planet Eternia and the Castle of Greyskull which is coming under threat from the evil Skeletor who wants to take over the planet. A group of freedom fighters, led by the heroic He-Man are accidentally transported to Earth by a mysterious Cosmic Key, which holds the power to make Skeletor all-powerful. Once on Earth, He-Man and Co. team up with two teenagers as they attempt to find the key and return home. However, Skeletor and his minions are soon hot on their trail…