Big Fats Dynamo has turned himself in just so he can be the first person to break out of Rebel's Island prison.The warden is left no choice, so he sends for Atom Ant.
Dr. Crankenshaft M.D.(Mad Doctor) has created a monster to help him conquer the world.Everything goes his way until they rob a bank and Atom Ant is alerted.
Ferocious Flea and his boss, Bones, steal the Colonel's priceless dog from the dog show. Atom Ant tunes his antenna in on the trouble and tracks down the culprits to a fleabag hotel, where he has it out with Ferocious Flea.
Lured by a phony letter about Doctor Strangebug's reform, Atom Ant goes straight for the lump of sugar on his time machine! Sent back to the days of King Arthur, Atom Ant tames the dragon and is dubbed "Sir Atom Ant".
In his latest plan to conquer the world, Professor Von Gimmick terrorizes Big City with his monster, "The Big Gimmick". After using a battery of weapons against Atom Ant, the professor's computer tells him no ant can resist a picnic spread.
Atom Ant and the neighborhood kids race to their local supermarket to see a live appearance by Super Guy, but he's not there. Atom Ant finds him in the TV Studio, afraid to let the kids know he's a super hero only because of trick photography.
When the ant hill mob takes over the city picnic grounds, the park commissioner's job is on the line, so he calls in Atom Ant for help. To defend the honor of all ants, Atom Ant teaches the ant hill mob to behave.