The Girl by the Roadside.

Unknown to Judith Ralston, her brother Budd and his wife Vera are counterfeiters. In order to escape Fayban, a secret service agent, they leave Judith at a little town in Virginia. One day while out horseback riding, Judith is injured and rescued by Boone Pendleton, who takes her to his cabin. Later, she receives instructions from her brother to go to the Ralston house and destroy anything that she sees. Fayban, suspicious of the girl, wires Washington to shadow her.