After baby chimpanzee Sam Simian's mother got killed by a leopard he is adopted by Liz Day the primatologist who happened to be studying Sam's chimpanzee clan. Liz decides to try and raise Sam no differently than a human baby and begins to teach Sam American Sign Language only the version she teaches him was developed by KOKO the gorilla who modified ASL for a creature with non-opposable thumbs. Sam becomes fluent in sign language and eventually shows...