While visting Debbie's Aunt Belle, the crew witnesses the theft of her cattle on her ranch. Speed Buggy, Debbie, Tinker, and Mark set out to stop the evil Beefinger, the mastermind behind the robbery.
After learning about Speed Buggy's capabilities, Dr. Kluge plots to steal the automobile in order to create his own powerful version. Through various bribes and kidnapping attempts, Kluge is desperate to steal Speed Buggy.
During a racing event, a man known as "The Chief" hijacks all of the cars with a motion control device. The crew tries to put an end to the menace's unacceptable behavior.
While participating in a race, Speed Buggy takes a liking to Mata Cari, an automobile designed by the evil Baron Vulch. Meanwhile, Pygmo, Vulch's assistant, lures Speed Buggy to a castle to retrieve a device that Vulch planted inside of his trunk.
In the Andes, the crew vacates a plane facing difficulty while flying, deserting them in region solely inhabited by gorillas. Two men, Professor Grovac and Karl, pressure Speed Buggy into kidnapping the king gorilla in order to have their own army.
The villainous Professor Snow and Madame Ice create automobiles for ice in order to travel. After learning about Speed Buggy, they attempt to control Tinker in order to take over the world.
Speed Buggy and crew help Professor Rigby, who is being attacked by his former colleague, Professor Rishna, after discovering an invisibility solution. Rishna uses it to kidnap Debbie and Mark while Tinker and Speed Buggy come to their rescue.
The menacing Gold Fever manages to steal gold from around the world, even Speed Buggy's prized racing trophy. In order to stop his continued thefts and rescue Debbie after being kidnapped, Mark and Tinker travel to Hawaii to end his plans.
Traveling aboard a cruise ship, the crew falls overboard and ends up on an island infested by large plants that were modified by Dr. Meangreen. In order to control the universe, Meangreen attempts to steal Speed Buggy's remote control device.
An evil replica of Speed Buggy designed by Dr. Ohm steals a powerful battery capable of ruining objects through the use of sound waves. The crew breaks into Ohm's secret headquarters in order to retrieve the stolen device and return to normalcy.
The crew visits Pleasure Island to enter the Bayou 500 racing competition. During the race, they find a ringmaster who plans to control all of the nearby animals in order to rule the world.
At a race in the United States and Mexico, the crew encounters Jerick who is able to grow and multiply due to a powerful potion that Jerick's former friend created. However, the former friend places the potion's recipe on a tape that Jerick steals, so he asks Speed Buggy to retrieve the tape and save the day.
Varzak and Emil, both crazy scientists, create a laser device that has the ability to take over the universe. In order to safely hide the device from the authorities, they plan to steal Speed Buggy and escape through a jungle.
In an oil reserve in Oklahoma, the crew encounters Dr. Vesuvio, who is collecting large quantities of oil in order to rule the world. However, they discover that Vesuvio has been illegally hoarding the oil in order to accomplish the feat.
While in the Himalayas, Speed Buggy visits the Hidden Valley of Amazonia, where the women use the men for slaves. Queen Sheba pressures Debbie into turning Mark and Tinker into slaves. In order to stop her plans, Speed Buggy and Debbie attempt to overthrow Sheba.
Captain Schemo plans to use his private collection of submarines in order to take over the oceans and the world. The crew stumbles upon Scheemo's underwater stash and attempts to stop him before he controls the entire universe.
