A pair of crooks steal a valuable package, hold up the crew of a freight engine, and compel the engineer to aid their escape. Learning this, Helen climbs into the cab of a locomotive standing on a siding and takes up the chase.
| Actor | Role |
|---|---|
 Helen HolmesHelen | Helen |
 George A. WilliamsTom O'Grady - Section Foreman | Tom O'Grady - Section Foreman |
 Leo D. MaloneyDuncan - Locomotive Engineer | Duncan - Locomotive Engineer |
 William EhfeRed Durham - a Yeggman | Red Durham - a Yeggman |
| MM.J. MurchisonMike Keenan - Red's Pal | Mike Keenan - Red's Pal |