Jungle Jim is asked to travel to India to rid the countryside of a man-eating tiger. When he arrives, Jim discovers that a native tribe are using the tiger to extort protection money from other inhabitants.
Jungle Jim leads a party into the Himalayas to observe a solar eclipse. They stumble into a strange Tibetan kingdom ruled by a white man. Jim must effect their escape by trying to convince the superstitious natives that he can make the sun disappear.