At the center of the universe, at the border between the light and the dark stands Castle Greyskull. For countless ages, the Sorceress of Greyskull has kept this universe in harmony. But the armies of darkness do not rest, and the capture of Greyskull is ever most in their minds. For with those that control Greyskull come, the Power. The power to be supreme, the power to be almighty, the power to be... Masters of the Universe!