Billy Garrison, a successful young jockey, rides the favorite "Sis" in the Louisville Derby. He does not ride with his customary vigor and dash. He feels "doped" and entirely out of condition and as a consequence "Sis," instead of winning the race, trails in last under the wire. At the stables he is accused of throwing the race, but denies it.
| Actor | Role |
|---|---|
 Sidney SmithBilly Garrison | Billy Garrison |
 Earle FoxeNot listed | Not listed |
 Lafe McKeeNot listed | Not listed |
 Lillian HaywardNot listed | Not listed |
 Adda GleasonNot listed | Not listed |
 Charles WheelockNot listed | Not listed |
 William HutchisonNot listed | Not listed |
| WWalter HatfieldNot listed | Not listed |