Thundarr, Princess Ariel, and Ookla escort a man who is carrying a magical black pearl that can defend against the two-faced wizard Gemini and his Groundlings (a race of mutated rat people). The man needs the pearl to protect the inhabitants of the village of "Manhat", which is actually the ruins of Manhattan.
Thundarr, la princesa Ariel y Ookla escoltan a un hombre que lleva una perla negra mágica que puede defenderse contra el mago de dos caras Gemini y sus Groundlings (una raza de ratas mutantes). El hombre necesita la perla para proteger a los habitantes de la aldea de "Manhat", que en realidad son las ruinas de Manhattan.
