Joy the magician is having a "Joy's Magic Circus Show" with the world-renowned circus cars but it looks like the circus master can't make to the show anymore. Poco, Billy, Max and Chris are bored of their daily routine of work at the construction site.
During a short break after work, they perform some acrobatics and they are pretty good! Joy the Magician is impressed at what they can do and asks if they would like to be on his circus show. The four heavy duty vehicles accept Joy's offer to join him in the show.