Astronaut Taylor crash lands on a distant planet ruled by apes who use a primitive race of humans for experimentation and sport. Soon Taylor finds himself among the hunted, his life in the hands of a benevolent chimpanzee scientist.
A successful businessman falls in love with the girl of his dreams. There's one big complication though; he's fallen hook, line and sinker for a mermaid.
In a futuristic world that has embraced ape slavery, a chimpanzee named Caesar resurfaces after almost twenty years of hiding from the authorities, and prepares for a revolt against humanity.
