Having figured out the key to growth being a certain imo-youkan, Grotch unleashes the full potential of Bowzock's best eater, forcing the Carranger to fully utilize their new dream vehicles and merge into a giant robot to face it.

Naoki is strangely being ignored by the rest of Carranger after meeting with a rival car-maker, while Glutch invents a weight-loss spray with peculiar side effects that he gives to a graffiti-making Bowzock thug .

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.

Without their Carmagic, the Carranger face their darkest hour while Exhaus reveals his final, true intention for the Bowzock and the destruction of Earth.

The Carranger face off in a final confrontation with Exhaus for the fate of Earth; but against an enemy with the evil powers of the universe on his side, can they finally bring peace (and traffic safety) once and for all?