A scientist discovers a death ray and locks it in a box, giving the key to his daughter, who soon finds herself hunted by criminals looking to steal the deadly mineral.
| Actor | Role |
|---|---|
 Ruth CliffordMystery | Mystery |
 Sidney BraceyJean Deaux | Jean Deaux |
 Edwards DavisJohn Haldane | John Haldane |
 William H. TookerGang Member | Gang Member |
 Jack SherrillJack Stone | Jack Stone |
| CCorene UzzellMarianna, Crystal Gazer | Marianna, Crystal Gazer |
| EEdith ForrestNot listed | Not listed |