An alien child's quest to take a photograph of a "mysterious creature known as a human" has an unexpected result when a search through an Earth zoo brings an encounter with a gorilla.
Ten-year-old Kate begins a communication exchange on a computer with someone purporting to be from outer space, who says he is going to pay a visit to Earth soon.
Rachel and her friends run into a dying alien who gives them the power to morph into any animal they touch, placing the responsibility of saving the Earth from a silent, deadly attack completely in their hands.
After Susan sees Mr. Smith the substitute teacher peel off his face, she knows he's an alien and only Peter believes her. Together they work to save the class from Mr. Smith's horrible plans.