American tourists David and Jack are savaged by an unidentified vicious animal whilst hiking on the Yorkshire Moors. Retiring to the home of a beautiful nurse to recuperate, David soon experiences disturbing changes to his mind and body.

Two separate people, a man and a woman, find something very stirring about the sea turtles in their tank at the London Zoo. They meet and form an odd, but sympathetic camaraderie as they plan to steal two of the turtles and free them into the ocean.

The film examines the redesign of various exhibits at the London Zoo. The film was produced for the Museum of Modern Art, New York, and the Zoological Society of London, England.

Explore London Zoo with one of its greediest residents, Sally the sparrow.