As the team visits Seattle, Kim's father, Mr. Nakamura, a software designer, is on urgent business with other scientists. However, a mysterious person using a mind-controlling device steals the minds of the scientists including Mr. Nakamura to obtain certain knowledge. The team plans to find out the mystery and save the scientists and their minds from this evil foe.
Mr. T and the team are in Mississippi planning to turn a rundown plantation called "Magnolia House" into a gymnastics camp, but a gang of street car thugs called the Ghost Riders threatened to eliminate the team. Jeff's bragging to a pretty girl gets overheard by the Ghost Riders, who use that information which puts the team in danger. Rumor has it that the original owner of Magnolia House left something behind, and the team has to figure out what it is.
Bisby's late-night run-in with a classic car called the "Silver Swan" prompts the team staying at Lake Tahoe to investigate. Unknowingly, a local car dealer, museum staff and the car maker's original owner are part of an illegal automobile ring planning to sell duplicate copies of the Silver Swan and other vehicles. Robin tries to do everything for the team so she can get credit for this caper as well as the upcoming meet.
The team takes a rest in Miami and sees an air show starring Jeff's cousin "The Great Marco". During his air show stunt, which involves dropping a sports car by parachute, he turns up missing causing Jeff to worry. Meanwhile, Woody has fallen for a woman named Vanetta Price whose involved in something Woody doesn't want to know. His jealousy almost got him and the team in hot water as they make their way into the Everglades to try and solve this swamp of a mystery.
The team heads into Monterey Bay to see an auto stunt show done by the Turbo Team in order to impress a Hollywood director to use their cars for his movie. At the same time, Robin develops a crush on the team's leader. However, a woman and two men are after something and plan on using the Turbo Team's prize automobile, the UltraCar to take it. Mr. T's wheels are spinning to solve this mystery before this caper speeds out of control.