Wallace MacDonald as a car mechanic who invents a revolutionary new carburetor. To prove the efficiency of his creation, MacDonald enters an important auto race. It soon develops that our hero is in direct competition with a car owned by Lionel Belmore, the father of his girl friend Elaine Hammerstein.
| Actor | Role |
|---|---|
 Elaine HammersteinRita Corbin | Rita Corbin |
 Wallace MacDonaldJack Reese | Jack Reese |
 Lionel BelmoreJoel Corbin | Joel Corbin |
 Robert OberMarcel Dejeans | Marcel Dejeans |
 Peggy O'NeilMary McQuire | Mary McQuire |
 Lee ShumwayRay Barton | Ray Barton |
| FFlora MaynardElsie | Elsie |