Helen catches two yeggmen who have broken into a freight car which has been detached from a train because of a hot box and are attempting to rifle the safe. The yeggmen escape aboard a passing freight with Helen, who has leaped upon the caboose, in hot pursuit, along with the trainmen.
| Actor | Role |
|---|---|
 Helen HolmesHelen | Helen |
 Leo D. MaloneyBilly Garwood - Express Messenger | Billy Garwood - Express Messenger |
| MM.J. MurchisonFrisco Tommy - Yeggman | Frisco Tommy - Yeggman |
 George A. WilliamsSpud Hogan - Tommy's Pal | Spud Hogan - Tommy's Pal |