Thundarr, Ariel and Ookla find a man with a Black Pearl, who asks them to take it to the village of Manhat (Manhattan). Gemini, a two-faced wizard, tries to stop Thundarr from delivering the Pearl.
Thundarr eventually discovers the secret of the Black Pearl: It makes him immune to Gemini's Powers. Thundarr finally delivers the Pearl to Manhat where Gemeni brings the Statue Of Liberty to life. Thundarr hurls the Black Pearl at the Statue and destroys the "life-force" animating it and Gemini (for now).