Adam, Prince of Eternia is the Defender of the secrets of Castle Grayskull. Fabulous secret powers were revealed to him the day he held aloft his magic sword and said "By the power of Grayskull, I have the power!" Cringer, his fearless friend, became the mighty BattleCat and he became He-man, the most powerful man in the universe. Only three others share this secret: their friends the Sorceress, Man-At-Arms and Orko. Together they defend Castle Grayskull from the evil forces of Skeletor.