Five-thousand-year-old vampire Miriam promises her lovers the gift of eternal life. When John, her cellist companion for centuries, discovers that he has suddenly begun growing old, he attempts to seek out the help of Dr. Sarah Roberts, a researcher on the mechanisms of aging.

Shot under the big top and on tour with the Clyde Beatty-Cole Brothers Circus, CANNONBALL! gives viewers a rare opportunity to experience first-hand a touring circus.