In an insane plot to split the planet in half, Dr. LeBon and his assistant Wilbur begin stealing diamonds and replacing them with imitations. Wendy and Marvin are captured by LeBon when they are guarding a diamond with Superman. Imprisoned, they tell Wilbur the story of Superman's origin to pass the time. Meanwhile, Dr. LeBon collects more diamonds. The SuperFriends are called in to investigate the missing diamonds and their missing friends. As time runs out, Wendy and Marvin begin to wonder if they will ever be free. Dr. LeBon is tracked down and stopped by the SuperFriends before he can succeed in his insane plan, saving Wendy and Marvin.