Divers position signs and a hot dog stand in a river for an underwater circus. Men on a dock help a pontoon boat pull away. Divers wearing old fashioned helmets with pumps hammer stakes into the river bottom. A man pulls an alligator into the river and releases it. Shots of the alligator swimming underwater. The man gets into a canoe and chases it down. The man dives into the water and ties up the alligator.