A camera and light show us the movement tracks for different activities in a study of motion.
M/S of a woman's legs walking along. M/S's of a young woman doing arm exercises, the film is speeded up to show her going very fast. An electric light is attached to her wrist and delayed action camera shows the tracks of her movement. One shows her playing a violin. Various shots of diagrams showing different formulas for movement and energy. A cartoon shows someone going faster than the speed of light and getting younger as they go. The lights are turned out so we can see the light on the woman's wrist. Various shots as she powders her nose and puts on her stockings. Various shots of a diagram of motion tracks for all sorts of things mixed up together.