The Silent Vow.

Jim Gorson, a handsome woodcutter, persuades the wife of Richard Stratton to elope with him. Twenty years later, Dick Stratton, Richard's son, a Northwest Mounted Policeman, is ordered to capture Bill and Doug Gorson. Circumstantial evidence points to the Gorsons as murderers of Dick's father, but the Gorsons escape, leaving behind their father wounded by the Mounties.