A swamp pirate, Jean La Fitt, runs amok and spoils Ruff and Reddy's fishing trip.
Deputized by Sheriff Cotton E. Pickens, the boys and Pickens are pursued by an alligator.
The alligator, knocked out by La Fitt, makes friends with Ruff after he revives him.
Ruff names the alligator Chopper, and adds him to the pirate posse.
La Fitt is cornered but makes an escape.
Ruff, Reddy and Sheriff Pickens try to find La Fitt's hideout.
La Fitt turns his cannons on our heroes.
LaFitt creates a whirlpool to stop Pickens, Ruff and Reddy.
Our heroes look for LaFitt's hideout.
Cotton Pickens nearly meets his doom.
Chopper nearly destroys the raft our heroes are using.
Ruff turns Chopper into a makeshift whooshmobile.
Chopper helps with the final corralling of LaFitt.
Ruff and Reddy are trainbound for Spooky Rock where a rendezvous with Professor Gizmo is to take place
Gizmo presents his invention, a mobile borer with which he plans to gather substrata data in the mountains. The outlaws Killer and Diller follow our heroes.
Killer and Diller watch in amazement as Gizmo tests out his borer.
Satisfied with the borer's success, Killer and Diller plan to hijack it with the plan of finding the Lost Dutchman mine.
Killer and Diller show up and force Gizmo to drive the borer to the Lost Dutchman mine.
After a lights-out fight, Ruff gets the drop on Killer and Diller. Reddy ties them up and transports them away to the nearest jail.
A bump in the road causes Killer and Diller to bump off Reddy's car. The outlaws make a getaway with Reddy in pursuit.
Jumping off a railroad bridge, Killer and Diller land in a river. Reddy returns to the borer.
Gizmo, Ruff and Reddy discover an illuminated mine. Killer and Diller discover a secret entrance back to the mine.
Our heroes meet Schultz, the ghost of the Lost Dutchman. Killer and Diller pursue him in a merry chase.
Killer and Diller force Ruff, Reddy and Gizmo into piling the borer with bags of gold.
Schultz secretly leads our heroes to a safe place while having fun at Killer and Diller's expense.
Schultz lets Killer and Diller leave with all the gold they can carry. But there's a catch -- the gold disappears once the two are outside, and their entrance is sealed off.
After running afoul of a carnival policeman, Ruff and Reddy hide out in a hot-air balloon which slips its moorings.
Ruff and Reddy find themselves in midair.
Ruff and Reddy try to ward off a giant vulture which is attacking their balloon.
Ruff and Reddy land near an island and hear a voice repeatedly calling, "Help! Murder! Police!"