Through an accomplice the band of conspirators preying on railroads succeed in having the boxcar loaded with auto tires sidetracked at Lone Point instead of being taken on to its rightful destination. They are getting away with the valuable shipment when Helen takes a hand in the affair. While each of the trio carries a load of tires back to the autos which are in a sheltered spot, Helen hurriedly climbs the side of the boxcar and releasing the brakes the car, with its heavy load, starts down grade at great speed. Later, when the conspirators overpower the detectives sent to capture them and send their engine running wild down the tracks it seems certain that Helen, alone on the boxcar, is doomed to death. Fortunately, her signal is seen by the switchman and without a foot to spare, the box car takes the siding just as the engine tears by. Helen, throwing caution to the winds, leaps to the tender of the engine and in a moment it is brought to a stop.