Jungle Jim is hired to lead an expedition into the jungle to find a lost temple. It is believed that a poison can be found at this temple that can lead to a cure for polio.
Okay, you've got Johnny Weissmuller, newly retired from the Tarzan series, and you want to star him in a fresh new series of jungle movies. Naturally, you want to start off the series putting your best foot forward to ensure success, so you decide you'll have to come up with something extra-special for the plot. So, naturally, you decide upon...a Double-Stuffed Safari-O? For those unfamiliar with the term, I define a Double-Stuffed Safari-O thusly; it is any jungle movie which features exposition on one end, denoument on the other, and is filled in-between with an overly-generous portion of safari. I always take this plot as being the writer's way of saying that they had no idea in how to fill in the middle of the story.
The safari section does serve some functions, though; it leaves plenty of time for animal antics and establishing that the woman (who is obviously intruding on a man's world) can't really hack it in this environment and needs a man to help her out (aka Jungle Jim). Probably the most novel thing the movie does is that it gives Jungle Jim two animal friends, and neither one is a chimp. One is a dog (which, as a pet in a jungle movie, is singularly lame), but the other is a raven (or a crow; I could never tell them apart). Though these pets wouldn't persist throughout the entire series, I've run into them before, and once again, the dog proves near useless (man's best friend indeed!), while the raven is the one who proves most useful in saving lives. Still, those willing to endure the safari section of the movie will find that the ending is pretty good, and fans of the "The Adventures of Superman" will get a chance to see George Reeves as the villain of the piece. Other than that, it's pretty routine; elephant stampedes, animal antics, lion wrestling, same ol', same ol'.