The story begins with the emergence of the first high-tech molcar in Molcity, with drivers beginning to ride state-of-the-art AI-driven Molcars. Potato and friends get involved in a chase between a mysterious organization and a Molcar AI named Cannon, and are saved by a talented driver. Potato finds out that the driver is in search of his missing Molcar, and gets the idea to use Cannon's AI functionality to help with the search.