The story begins with the music and noise of the circus. Clark Kent and Lois Lane are at the Midway, Lois having an assignment to cover its events.
She expresses her regret that she didn’t have a more exciting assignment. Clark offers his condolences, then leaves for his own assignment as the show begins.
Later that night, as Lois attends the clown performance, a monkey wanders from the main tent and accidentally opens the cage of a giant gorilla (perhaps a homage to King Kong). Growling, the Gorilla named “Gigantic” wanders into the tent putting a stop in all of the acts and sending everyone into pandemonium. Circus workers attempt to tie the gorilla down with ropes, but are overpowered by its strength and are forced to flee. While other workers are struggling to keep the other animals under control, some of the elephants stampede, or rear up against their owners, knocking other cages open.
Clark arrives on the scene alongside the police and sees the chaos. Quickly, he changes into his Superman costume and begins returning animals like the lions and a black panther to their cages. Right after tossing an elephant into a cart, he hears a scream: Lois is trapped at the top of a pole holding up the tent and the giant gorilla is climbing perilously close. Superman confronts the gorilla and ties it down, but during the fight one of the tent poles falls down and hits a power circuit, starting a fire. After tying the gorilla up in the net, Superman saves Lois from the flames just in time and then puts out the fire.
