A meteor crashes at night on the outskirts of Metropolis and comes to life as a strange orange creature with a large mouth. The creature proceeds to consume a number of railroad tracks and when menaced by an approaching bear, the creature transforms itself into an exact replica of the bear to frighten the animal away. An approaching train carrying Clark and Los seems certain to crash but Clark changes into Superman and saves the day.
Superman sees the chewed up tracks but no sign of what did it and heads back to Lois with the creature nearby reverting back to its normal form and starts heading for Metropolis.
The following day, Lois is waiting for Clark in a car when the creature suddenly appears and starts eating the car she is in. Suddenly, the creature runs off as Clark arrives in the area. Clark investigates but the creature has taken on the appearance of a maintenance man and fools Clark into thinking the creature is gone.
The creature is seen by a policeman eating the steel skeleton of a skyscraper but the creature assumes the shape of the cop before the real policeman sees what is happening. The creature continues eating after the cop leaves and Superman arrives in the area. Superman stops the structure from collapsing and flies off in search of the creature. Spotting it near a bridge, Superman grabs the creature but the creature changes into a duplicate of Superman. Lois and Perky watch from the bridge as Superman defeats the creature and carries it to an asteroid of iron where it can eat metal and cause no more problems.
Afterwards, Lois admires the story she wrote for the Daily Planet and Clark privately muses that he's glad the creature didn't take a bite out of the Man of Steel.