When a loud noise in the night awakens two children, it starts them on a late-night adventure! At first, they think the noise is coming from inside their home, but they soon discover that it originates in their back yard. To their delight, the noise is being made by an assortment of animals that escaped from the local circus. They spend a magical night playing with these exciting creatures-eating, dancing, and singing until the sun comes up, and then returning to their beds before Mom and Dad discover that they're missing. When they wake up a few hours later, they wonder if it was all a dream ... until they look into their back yard!