Keith, Sven, Hunk, Lance, and Pidge, a quintet of Space Explorers under the Galaxy Alliance, notice a brutal attack upon Planet Arus while on their travels. Attempting to land and give relief, they see virtually everything has been destroyed, and are shot down by a remaining slave-ship and imprisoned. King Zarkon of Doom intends to have them fight his robot-monster so he will have no witnesses from the Alliance to his assault on Arus. Too isolated for help, they try to think of a way to escape Castle Doom, and are reminded of the legendary robot from Arus, Voltron, Defender of the Universe...
—brainybrailler@comcast.net