Amidst a backdrop of growing violence and intimidation, independent cab drivers struggling against a consolidated juggernaut rally around hot-tempered Matt Nolan. Nolan is determined to keep competition alive on the streets, even if it means losing the woman he loves.

In a world wherein cars act like humans, Junior wants to be a taxi, but his mother wants him to grow up to be a nice touring car like his father. Mom doesn't know that Junior sometimes skips school and ventures into the city to ride in traffic, drink hi-test gas, and race trains.