Tiring of his Carranger training, Kyosuke stays behind to work on the boss' car while the others take on a guts-enhancing Gorotsuki.

On a trip to Earth to sample the local delicacies, Inventor Grotch accidentally becomes a giant from something he ate, forcing the Carranger into a situation where they must create a means to fight larger threats.

Kyosuke quits the Pegasus Garage hoping to pursue his racing dreams, while encountering a peculiar Gorotsuki dish-cleaner who may be connected to Dapp's childhood racing hero.

Natsumi decides to adopt Naoki as her little brother and help him out when they're confronted by a female bancho Gorotsuki and her rampaging army of bicycle riders.

In hoping to improve their battles with the Carranger, the Bowzock hire Instructor Ritchihiker for consultation, unaware of his own long history with Signalman.

Ritchihiker enlists a fashion designer Gorotsuki to create a mind-controlling outfit that brainwashes Signalman and Sirender under his control to fight the Carranger.

Signalman's by-the-book rules obsessions ends up getting him in trouble with Kyosuke after Ichitarou gets abducted from summer school for a plot to create new Bowzock members.

Naoki must work through his emotions in order to protect a princess being pursued by an Olympic-themed Gorotsuki trying to capture a jewel for the Bowzock.

With Ichitarou captured for the ceremonial Bowzock Festival, Signalman and the Carranger scramble to get him back before he is used to grant them a greater evil power.

With his mind and body strengthened by evil energy and a newly bought giant mech, RitchiRitchihiker begins a campaign against all of his enemies, including the Carranger (who are suddenly without Dappu) and Gynamo.

Signalman returns to Earth, but has suddenly turned evil under a mysterious influence, ignoring all his previous friendships and entering a rampage over a personal trauma.

With Signalman altered and allied with the Bowzock, the Carranger and Dapp must work out a way to remove the influence of the mind-altering gas to save both him and Sigtarou.