Speed heads to Nairobi for the Trans-African Grand Prix, after his plane crashes, he is dumped into the jungle and stranded on an island where the exiled General Smasher, a ruthless dictator who is creating giant monsters. Speed must fend for himself amidst giant spiders and gargantuan gorillas and becomes essentially a "jungle boy" (complete with swinging on vines and his clothes ripped to shreds) trying to stop General Smasher.