Nikki 'Sparks' Turner is a mechanic. One day she walks past a TV star who is having car trouble and offers her help, but the star doesn't believe a girl can assist him. Despite that, she manages to get the car running, and it's filmed by the star's fans. Soon the video goes viral, and 'Sparks' becomes famous. Jeremy, who was the TV star's agent, lost his job because of the video and needs a new candidate to propose as the host for the USA's biggest car show. He seeks out 'Sparks' and convinces her to try for the job as the first female host of the show and a role model for girls who want to work on cars.
It is noticeable that it is a slightly cheaper production, and although the message of the film (that girls can) is well-intentioned, it doesn't quite ring true.