Trapped in the unforgiving marshlands of Equatorial Africa, in the heart of an impenetrable virgin jungle, a scientific expedition faces imminent failure. Surrounded by monstrous, man-eating crocodiles, the scientists face certain death until Tarzak, a mountain of muscles and the jungle's defender, comes to their aid. However, this is hostile territory, rife with dangers and the ferocious, sun-worshipping Leopard Men: a legendary, supposedly extinct tribe of warriors no white man has ever seen before. Now, blood-thirsty goddess Kaluba demands a sacrifice. Can fearless Tarzak defeat the vicious Leopard Men?