A Mystery of the Rails (1916)

Jud Hendricks, foreman of the construction camp, is being blackmailed by Gypsy Joe, who knows of a dark page in the Hendricks' past. Hendricks and Tom Rasom are rivals for the favor of Helen, with Tom in the lead. The latter, an engineer, is about to take his train out when he finds Gypsy Joe hiding in a boxcar.